diff --git a/src/db.php b/src/db.php
index 33fa264..0cc3112 100644
--- a/src/db.php
+++ b/src/db.php
@@ -217,7 +217,7 @@ public function resetReingest($id)
 		
 		try
 		{
-			if (DEBUG) debug('Updating HTML cache...');
+			if (DEBUG) debug('Resetting reingest flag...');
 			$st = $this->db->prepare("UPDATE metadata m SET m.reingest=FALSE WHERE m.id = :id");
 			DB::tryBind($st, ":id", $id);
 			if ($st->execute())
@@ -249,19 +249,19 @@ public function getCachedMSQ($id)
 		if (DISABLE_MSQ_CACHE)
 		{
 			if (DEBUG) debug('Cache disabled.');
-			return FALSE;
+			return null;
 		}
 		
 		if ($this->needReingest($id))
 		{
 			if (DEBUG) debug('Flagged for reingest.');
 			$this->resetReingest($id);
-			return FALSE;
+			return null;
 		}
 		
 		if (!$this->connect()) return null;
 		
-		$html = FALSE;
+		$html = null;
 		
 		try
 		{
@@ -276,15 +276,14 @@ public function getCachedMSQ($id)
 				if ($html === NULL)
 				{
 					if (DEBUG) debug('No HTML cache found.');
-					return FALSE;
+					return null;
 				}
 				else if (DEBUG) debug('Cached, returning HTML.');
 			}
 			else
 			{
 				if (DEBUG) debug("No result for $id");
-				echo '<div class="error">Invalid MSQ</div>';
-				return null;
+				return FALSE;
 			}
 		}
 		catch (PDOException $e)
@@ -295,40 +294,6 @@ public function getCachedMSQ($id)
 		return $html;
 	}
 	
-	public function getMSQForDownload($id)
-	{
-
-		if (!$this->connect()) return null;
-		
-		$xml = FALSE;
-		
-		try
-		{
-			$st = $this->db->prepare("SELECT xml FROM msqs INNER JOIN metadata ON metadata.msq = msqs.id WHERE metadata.id = :id LIMIT 1");
-			DB::tryBind($st, ":id", $id);
-			$st->execute();
-			if ($st->rowCount() > 0)
-			{
-				$result = $st->fetch(PDO::FETCH_ASSOC);
-				$st->closeCursor();
-				$xml = $result['xml'];
-				if (DEBUG) debug('Cached, returning HTML.');
-			}
-			else
-			{
-				echo "<div class=\"debug\">No result for $id</div>";
-				echo '<div class="error">Invalid MSQ err 2</div>';
-				return null;
-			}
-		}
-		catch (PDOException $e)
-		{
-			$this->dbError($e);
-		}
-		
-		return $xml;
-	}
-	
 	/**
 	 * @brief Get a list of MSQs
 	 * @param $bq The BrowseQuery to filter results
@@ -648,7 +613,7 @@ public function updateMetadata($id, $metadata)
 		
 		try
 		{
-			if (DEBUG) debug('Updating HTML cache...');
+			if (DEBUG) debug('Updating MSQ metadata...');
 			$st = $this->db->prepare("UPDATE metadata md SET md.fileFormat = :fileFormat, md.signature = :signature, md.firmware = :firmware, md.author = :author WHERE md.id = :id");
 			//$xml = mb_convert_encoding($html, "UTF-8");
 			DB::tryBind($st, ":id", $id);
@@ -755,9 +720,6 @@ public function getXML($id)
 				$result = $st->fetch(PDO::FETCH_ASSOC);
 				$st->closeCursor();
 				$xml = $result['xml'];
-			} else {
-				//TODO Send real 404
-				echo '<div class="error">404 MSQ not found.</div>';
 			}
 		}
 		catch (PDOException $e)
diff --git a/src/download.php b/src/download.php
index 6a034e6..47a7fc7 100644
--- a/src/download.php
+++ b/src/download.php
@@ -18,11 +18,22 @@
 require "msqur.php";
 
 if (isset($_GET['msq'])) {
-  header('Content-Type: application/xml');
-  header('Content-Disposition: attachment; filename="' . $_GET['msq'] . '.msq"');
-  header('Pragma: no-cache');
+  $id = $_GET['msq']; //TODO Sanitize
 
-  echo $msqur->getMSQForDownload($_GET['msq']);
+  $xml = $msqur->getMSQForDownload($id);
+
+  if ($xml) {
+    header('Content-Type: application/xml');
+    header('Content-Disposition: attachment; filename="' . $id . '.msq"');
+    header('Pragma: no-cache');
+    echo trim($xml); //`trim` is a workaround for #30
+  } else {
+    http_response_code(404);
+    unset($_GET['msq']);
+    include "view/header.php";
+    echo '<div class="error">404 MSQ file not found. </div>';
+    include "view/footer.php";
+  }
 } else {
   include "index.php";
 }
diff --git a/src/msq.php b/src/msq.php
index 3b2b97d..89d465b 100644
--- a/src/msq.php
+++ b/src/msq.php
@@ -27,7 +27,7 @@ class MSQ
 	/**
 	 * @brief Format a constant to HTML
 	 * @param $constant The constant name
-	 * @param $value It's value
+	 * @param $value Its value
 	 * @returns String HTML \<div\>
 	 */
 	private function msqConstant($constant, $value, $help)
@@ -35,7 +35,7 @@ private function msqConstant($constant, $value, $help)
 		//var_export($constant);
 		//var_export($value);
 		//var_export($help);
-		return "<div class=\"constant\" title=\"$help\"><b>$constant</b>: $value</div>";
+		return "<span class=\"constant\" title=\"$help\"><b>$constant:</b><span class=\"value\">$value</span></span>";
 	}
 	
 	/**
@@ -60,10 +60,9 @@ public function parseMSQ($xml, &$engine, &$metadata)
 					error($error->message);
 			}
 
-			$html['header'] = '<div class="error">Unable to parse MSQ.</div>';
+			throw new MSQ_ParseException("Error parsing XML", '<div class="error">Unable to parse MSQ.</div>');
 		} else if ($msq) {
 			$msqHeader = '<div class="info">';
-			$msqHeader .= '<div style="float: right;"><a title="Download MSQ File" href="download.php?msq=' . $_GET['msq'] . '">💾</a></div>';
 			$msqHeader .= "<div>Format Version: " . $msq->versionInfo['fileFormat'] . "</div>";
 			$msqHeader .= "<div>MS Signature: " . $msq->versionInfo['signature'] . "</div>";
 			$msqHeader .= "<div>Tuning SW: " . $msq->bibliography['author'] . "</div>";
@@ -101,8 +100,16 @@ public function parseMSQ($xml, &$engine, &$metadata)
 			
 			$engineSchema = getEngineSchema();
 			
-			$html["precurves"] = '<div class="group-header">2D Tables (Curves)</div>';
-			$html["curves"] = "";
+			$html["tabList"] = <<<EOT
+			<div id="tabList">
+				<ul>
+					<li><a href="#tab_tables">3D Tables</a></li>
+					<li><a href="#tab_curves">2D Tables (Curves)</a></li>
+					<li><a href="#tab_constants">Constants</a></li>
+				</ul>
+			EOT;
+
+			$html["tabList"] .= '<div id="tab_curves">';
 			foreach ($curves as $curve)
 			{
 				if (in_array($curve['id'], $this->msq_curve_blacklist))
@@ -129,13 +136,13 @@ public function parseMSQ($xml, &$engine, &$metadata)
 					$yBins = $this->findConstant($msq, $curve['yBinConstant']);
 					$xAxis = preg_split("/\s+/", trim($xBins));
 					$yAxis = preg_split("/\s+/", trim($yBins));
-					$html["curves"] .= $this->msqTable2D($curve, $curve['xMin'], $curve['xMax'], $xAxis, $curve['yMin'], $curve['yMax'], $yAxis, $help);
+					$html["tabList"] .= $this->msqTable2D($curve, $curve['xMin'], $curve['xMax'], $xAxis, $curve['yMin'], $curve['yMax'], $yAxis, $help);
 				}
 				else if (DEBUG) debug('Missing/unsupported curve information: ' . $curve['id']);
 			}
+			$html["tabList"] .= '</div>';
 			
-			$html["pretables"] = '<div class="group-header">3D Tables</div>';;
-			$html["tables"] = "";
+			$html["tabList"] .= '<div id="tab_tables">';
 			foreach ($tables as $table)
 			{
 				if (DEBUG) debug('Table: ' . $table['id']);
@@ -154,13 +161,13 @@ public function parseMSQ($xml, &$engine, &$metadata)
 					$xAxis = preg_split("/\s+/", trim($xBins));
 					$yAxis = preg_split("/\s+/", trim($yBins));
 					$zData = preg_split("/\s+/", trim($zBins));//, PREG_SPLIT_NO_EMPTY); //, $limit);
-					$html["tables"] .= $this->msqTable3D($table, $xAxis, $yAxis, $zData, $help);
+					$html["tabList"] .= $this->msqTable3D($table, $xAxis, $yAxis, $zData, $help);
 				}
 				else if (DEBUG) debug('Missing/unsupported table information: ' . $table['id']);
 			}
+			$html["tabList"] .= '</div>';
 			
-			$html["preconstants"] = '<div class="group-header">Constants</div>';
-			$html["constants"] = "";
+			$html["tabList"] .= '<div id="tab_constants">';
 			foreach ($constants as $key => $config)
 			{
 				if ($config[0] == "array") continue; //TODO Skip arrays until blacklist is done
@@ -180,9 +187,12 @@ public function parseMSQ($xml, &$engine, &$metadata)
 					if (array_key_exists($key, $helpTexts))
 					$help = $helpTexts[$key];
 					
-					$html["constants"] .= $this->msqConstant($key, $value, $help);
+					$html["tabList"] .= $this->msqConstant($key, $value, $help);
 				}
 			}
+			$html["tabList"] .= '</div>';
+			$html["tabList"] .= '</div>';
+
 		}
 		
 		return $html;
diff --git a/src/msqur.php b/src/msqur.php
index 2d2c8fb..7632678 100644
--- a/src/msqur.php
+++ b/src/msqur.php
@@ -45,8 +45,7 @@ public function getCachedMSQ($id)
 	
 	public function getMSQForDownload($id)
 	{
-
-		return $this->db->getMSQForDownload($id);
+		return $this->db->getXML($id);
 	}
 	
 	public function addMSQs($files, $engineid)
@@ -141,16 +140,15 @@ public function getEngineCodeList($make = null)
 	 */
 	public function view($id)
 	{
-		$this->header();
 		if (DEBUG) debug('Load MSQ: ' . $id);
 		//Get cached HTML and display it, or reparse and display (in order)
 		$html = $this->getCachedMSQ($id);
-		if ($html !== null)
+		if ($html !== FALSE)
 		{
 			$this->db->updateViews($id);
 			$msq = new MSQ(); //ugh
 			
-			if ($html == FALSE)
+			if ($html == null)
 			{
 				$engine = array();
 				$metadata = array();
@@ -165,22 +163,22 @@ public function view($id)
 						foreach($groupedHtml as $group => $v)
 						{
 							//TODO Group name as fieldset legend or sth
-							$html .= "<div class=\"group-$group\">";
+							//$html .= "<div class=\"group-$group\">";
 							$html .= $v;
-							$html .= '</div>';
+							//$html .= '</div>';
 						}
 						
 						$this->db->updateCache($id, $html);
 					} catch (MSQ_ParseException $e) {
 						$html = $e->getHTMLMessage();
-					}
+					} finally {
+						return $html;
+					}					
 				}
 			}
 		}
-		//TODO else show 404
-		
-		echo $html;
-		$this->footer();
+
+		return null;
 	}
 	
 	public function addEngine($make, $code, $displacement, $compression, $turbo)
diff --git a/src/upload.php b/src/upload.php
index 0eb3f24..e79758d 100644
--- a/src/upload.php
+++ b/src/upload.php
@@ -68,7 +68,7 @@ function checkUploads($files)
 		//Get and check mime types (ignoring provided ones)
 		$finfo = new finfo(FILEINFO_MIME_TYPE);
 		$mimeType = $finfo->file($file['tmp_name']);
-		if ($mimeType != "application/xml" && $mimeType != "text/xml")
+		if (!acceptableMimeType($mimeType))
 		{
 			if (DEBUG) warn('File: ' . $file['tmp_name'] . ': Invalid MIME type ' . $mimeType);
 			unset($files[$index]);
@@ -79,6 +79,22 @@ function checkUploads($files)
 	return $files;
 }
 
+/**
+ * @brief Check that a mime type matches ones we think are OK.
+ * @param $mimeType {string} MIME type
+ * @returns true or false
+ */
+function acceptableMimeType($mimeType) {
+	switch ($mimeType) {
+		case "application/xml":
+		case "text/xml":
+		case "text/plain":
+			return true;
+		default:
+			return FALSE;
+	}
+}
+
 //var_export($_POST);
 //var_export($_FILES);
 
diff --git a/src/view.php b/src/view.php
index 58561a9..997c275 100644
--- a/src/view.php
+++ b/src/view.php
@@ -18,7 +18,20 @@
 require "msqur.php";
 
 if (isset($_GET['msq'])) {
-	echo $msqur->view($_GET['msq']);
+	$id = $_GET['msq']; //TODO Sanitize
+	$html = $msqur->view($_GET['msq']);
+	if ($html !== null) {
+		include "view/header.php";
+		echo $html;
+		include "view/footer.php";
+	} else {
+		http_response_code(404);
+		unset($_GET['msq']);
+		include "view/header.php";
+		echo '<div class="error">404 MSQ file not found.</div>';
+		include "view/footer.php";
+	}
+} else {
+	include "index.php";
 }
-else include "index.php";
 ?>
diff --git a/src/view/header.php b/src/view/header.php
index 82eb8d3..f3c2516 100644
--- a/src/view/header.php
+++ b/src/view/header.php
@@ -8,11 +8,12 @@
 	<link rel="icon" type="image/x-icon" href="view/img/favicon.ico">
 	<link rel="stylesheet" href="view/msqur.css" />
 	<!-- Open Graph data -->
+	<meta property="fb:admins" content="127238424281477"/>
 	<meta property="og:title" content="msqur" />
-	<meta property="og:type" content="page" />
+	<meta property="og:type" content="website" />
 	<meta property="og:url" content="https://msqur.com/" />
 	<meta property="og:image" content="https://msqur.com/view/img/tutorial5.png" />
-	<meta property="og:description" content="Your Description Here" />
+	<meta property="og:description" content="Megasquirt tune (msq) sharing site" />
 	<meta property="og:site_name" content="msqur" />
 	<!-- Twitter Card data -->
 	<meta name="twitter:card" content="summary">
@@ -27,7 +28,6 @@
 	<link rel="stylesheet" href="//ajax.googleapis.com/ajax/libs/jqueryui/1.11.1/themes/smoothness/jquery-ui.css" integrity="sha384-5L1Zwk1YapN1l4l4rYc+1fr3Z0g23LbCBztpq0LQcbDCelzqgFb96BMCFtDwjq/b" crossorigin="anonymous">
 	<script src="//ajax.googleapis.com/ajax/libs/jqueryui/1.11.1/jquery-ui.min.js" integrity="sha384-ovZOciNc/R4uUo2fCVS1oDT0vIBuaou1d39yqL4a9xFdZAYDswCgrJ6tF8ShkqzF" crossorigin="anonymous"></script>
 	<script src="//ajax.googleapis.com/ajax/libs/angularjs/1.5.2/angular.min.js" integrity="sha384-neqWoCEBO5KsP6TEzfMryfZUeh7+qMQEODngh2KGzau+pMU9csLE2azsvQFa8Oel" crossorigin="anonymous"></script>
-	<script src="//ajax.googleapis.com/ajax/libs/angularjs/1.5.2/angular-resource.min.js" integrity="sha384-fQqYlHIz3plgWo88gnyC2Z5EKOTk53w3z102UGn+OnE17oQeCa4h+u0PPijIpklj" crossorigin="anonymous"></script>
 	<!-- Hosted scripts -->
 	<script src="view/lib/tablesorter/jquery.tablesorter.min.js"></script>
 	<script src="view/lib/Chart.js/Chart.min.js"></script>
@@ -97,6 +97,7 @@
 		<label><input id="normalizeAxis" type="checkbox" disabled />Normalize Axis</label>
 	</div>
 </div>
+<div id="downloadLink"><a title="Download MSQ File" href="download.php?msq=<?php echo $_GET['msq']; ?>">💾 Download MSQ</a></div>
 <?php
 }
 ?>
\ No newline at end of file
diff --git a/src/view/msqur.css b/src/view/msqur.css
index 523df5c..5de327f 100644
--- a/src/view/msqur.css
+++ b/src/view/msqur.css
@@ -82,9 +82,17 @@ div#splash img.tutorial {
 div#settings {
 	z-index: 999;
 	background: rgba(224, 224, 224, 32);
-	position: absolute;
+	float: right;
 	margin-top: 4px;
-	right: 8px;
+}
+
+img#settingsIcon {
+	cursor: pointer;
+}
+
+div#downloadLink {
+	margin: 5px;
+	float: right;
 }
 
 #fileDropZone {
@@ -110,16 +118,6 @@ table caption {
 	padding: 0.2em;
 }
 
-div[class^="group-"] {
-	border: 4px solid #F0F0F0;
-}
-
-div.group-header {
-	font-size: 3em;
-	text-align: center;
-	font-style: bold;
-}
-
 table.msq td:hover {
 	background-color: magenta !important;
 }
@@ -157,6 +155,28 @@ div.chart {
 	display: inline;
 }
 
+/* msqur.css | http://localhost:5050/view/msqur.css */
+
+div#tab_constants {
+	display: flex;
+  flex-flow: column wrap;
+  max-height: 900px;
+  overflow: auto;
+  max-width: 100%;
+}
+
+span.constant:nth-child(even) {
+	background-color: #e4e4e4;
+}
+
+span.constant {
+	margin: 0px 10px;
+}
+
+span.constant span.value {
+	float: right;
+}
+
 #engineForm {
 	display: table;
 }
diff --git a/src/view/msqur.js b/src/view/msqur.js
index cdab480..b006cde 100644
--- a/src/view/msqur.js
+++ b/src/view/msqur.js
@@ -70,10 +70,12 @@ $(function() {
 		heightStyle: "content",
 		activate: doChart
 	};
+
+	$('div#tabList').tabs();
 	
-	$('div.group-curves').accordion(accordionOptions);
-	$('div.group-tables').accordion(accordionOptions);
-	$('div.constant').tooltip();
+	$('div#tab_tables').accordion(accordionOptions);
+	$('div#tab_curves').accordion(accordionOptions);
+	$('div#tab_constants').tooltip();
 	
 	Chart.defaults.global.animation = false;
 	//Chart.defaults.global.responsive = true;