diff --git a/CHANGELOG b/CHANGELOG
index 05e2c19..7ba1f17 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,5 +1,16 @@
 Changelog
 =========
+## [1.8.1] - 2021-11-04
+### Summary
+This release provides one major bug fix in the FTLD follow-up packet, updated
+installation instructions, and a few minor fixes for bugs in error logging
+etc.
+
+### Updated
+ * Fix cappy install instructions in README
+ * Update FTLD FVP Z1X with fixed column spacing
+
+
 ## [1.8.0] - 2021-09-13
 ### Summary
 
diff --git a/README.md b/README.md
index 23b97ab..5460b10 100644
--- a/README.md
+++ b/README.md
@@ -21,7 +21,7 @@ HOW TO Convert from REDCap to NACC
 
 To install NACCulator, run:
 
-    $ python3 -m pip install git+https://github.com/ctsit/cappy.git@2.0.0#egg=cappy-2.0.0
+    $ python3 -m pip install git+https://github.com/ctsit/cappy.git@2.0.0
     $ pip3 install git+https://github.com/ctsit/nacculator.git
 
 Once the project data is exported from REDCap to the CSV file `data.csv`, run:
@@ -59,7 +59,7 @@ the `-file` flag._
                        [-lbd | -ftld] [-file FILE] [-meta FILTER_META] [-ptid PTID]
                        [-vnum VNUM] [-vtype VTYPE]
 
-    Process redcap form output to nacculator.
+    Process redcap export data through nacculator.
 
     optional arguments:
       -h, --help            show this help message and exit
diff --git a/nacc/ftld/fvp/builder.py b/nacc/ftld/fvp/builder.py
index 4dd39ee..5d8afb1 100644
--- a/nacc/ftld/fvp/builder.py
+++ b/nacc/ftld/fvp/builder.py
@@ -124,12 +124,12 @@ def add_z1x(record, packet):
         Z1X.B6LNOT  = record['fu_b6lnot']
     except KeyError:
         try:
-            if record['fu_lbudspch'] is not None:
-                Z1X.B2LSUB = '1'
-                Z1X.B2LNOT = ''
-            if record['fu_lbspcgim'] is not None:
+            if record['fu_lbudspch'] in ['0', '1']:
                 Z1X.B2LSUB = '1'
                 Z1X.B2LNOT = ''
+            if record['fu_lbspcgim'] in ['0', '1']:
+                Z1X.B6LSUB = '1'
+                Z1X.B6LNOT = ''
         # And leave the LBD fields blank if the project does not contain the
         # LBD module
         except KeyError:
diff --git a/nacc/ftld/fvp/forms.py b/nacc/ftld/fvp/forms.py
index 9a15a56..5aefe4a 100644
--- a/nacc/ftld/fvp/forms.py
+++ b/nacc/ftld/fvp/forms.py
@@ -46,21 +46,22 @@ def __init__(self):
         self.fields['LANGA4'] = nacc.uds3.Field(name='LANGA4', typename='Num', position=(61, 61), length=1, inclusive_range=(1, 2), allowable_values=['1', '2'], blanks=['Blank if Question 4b A4SUB = 0 (No)'])
         self.fields['A4SUB'] = nacc.uds3.Field(name='A4SUB', typename='Num', position=(63, 63), length=1, inclusive_range=(0, 1), allowable_values=['0', '1'], blanks=[])
         self.fields['A4NOT'] = nacc.uds3.Field(name='A4NOT', typename='Num', position=(65, 66), length=2, inclusive_range=None, allowable_values=['95', '96', '97', '98'], blanks=['Blank if Question 4b A4SUB = 1 (Yes)'])
-        self.fields['LANGB1'] = nacc.uds3.Field(name='LANGB1', typename='Num', position=(70, 70), length=1, inclusive_range=(1, 2), allowable_values=['1', '2'], blanks=['Blank if Question 6b B1SUB = 0 (No)'])
-        self.fields['B1SUB'] = nacc.uds3.Field(name='B1SUB', typename='Num', position=(72, 72), length=1, inclusive_range=(0, 1), allowable_values=['0', '1'], blanks=[])
-        self.fields['B1NOT'] = nacc.uds3.Field(name='B1NOT', typename='Num', position=(74, 75), length=2, inclusive_range=None, allowable_values=['95', '96', '97', '98'], blanks=['Blank if Question 6b B1SUB = 1 (Yes)'])
-        self.fields['LANGB4'] = nacc.uds3.Field(name='LANGB4', typename='Num', position=(77, 77), length=1, inclusive_range=(1, 2), allowable_values=['1', '2'], blanks=[])
-        self.fields['LANGB5'] = nacc.uds3.Field(name='LANGB5', typename='Num', position=(79, 79), length=1, inclusive_range=(1, 2), allowable_values=['1', '2'], blanks=['Blank if Question 8b B5SUB = 0 (No)'])
-        self.fields['B5SUB'] = nacc.uds3.Field(name='B5SUB', typename='Num', position=(81, 81), length=1, inclusive_range=(0, 1), allowable_values=['0', '1'], blanks=[])
-        self.fields['B5NOT'] = nacc.uds3.Field(name='B5NOT', typename='Num', position=(83, 84), length=2, inclusive_range=None, allowable_values=['95', '96', '97', '98'], blanks=['Blank if Question 8b B5SUB = 1 (Yes)'])
-        self.fields['LANGB6'] = nacc.uds3.Field(name='LANGB6', typename='Num', position=(86, 86), length=1, inclusive_range=(1, 2), allowable_values=['1', '2'], blanks=['Blank if Question 9b B6SUB = 0 (No)'])
-        self.fields['B6SUB'] = nacc.uds3.Field(name='B6SUB', typename='Num', position=(88, 88), length=1, inclusive_range=(0, 1), allowable_values=['0', '1'], blanks=[])
-        self.fields['B6NOT'] = nacc.uds3.Field(name='B6NOT', typename='Num', position=(90, 91), length=2, inclusive_range=None, allowable_values=['95', '96', '97', '98'], blanks=['Blank if Question 9b B6SUB = 1 (Yes)'])
-        self.fields['LANGB7'] = nacc.uds3.Field(name='LANGB7', typename='Num', position=(93, 93), length=1, inclusive_range=(1, 2), allowable_values=['1', '2'], blanks=['Blank if Question 10b B7SUB = 0 (No)'])
-        self.fields['B7SUB'] = nacc.uds3.Field(name='B7SUB', typename='Num', position=(95, 95), length=1, inclusive_range=(0, 1), allowable_values=['0', '1'], blanks=[])
-        self.fields['B7NOT'] = nacc.uds3.Field(name='B7NOT', typename='Num', position=(97, 98), length=2, inclusive_range=None, allowable_values=['95', '96', '97', '98'], blanks=['Blank if Question 10b B7SUB = 1 (Yes)'])
-        self.fields['LANGB8'] = nacc.uds3.Field(name='LANGB8', typename='Num', position=(100, 100), length=1, inclusive_range=(1, 2), allowable_values=['1', '2'], blanks=[])
-        self.fields['LANGB9'] = nacc.uds3.Field(name='LANGB9', typename='Num', position=(102, 102), length=1, inclusive_range=(1, 2), allowable_values=['1', '2'], blanks=[])
+        self.fields['LANGB1'] = nacc.uds3.Field(name='LANGB1', typename='Num', position=(68, 68), length=1, inclusive_range=(1, 2), allowable_values=['1', '2'], blanks=['Blank if Question 6b B1SUB = 0 (No)'])
+        self.fields['B1SUB'] = nacc.uds3.Field(name='B1SUB', typename='Num', position=(70, 70), length=1, inclusive_range=(0, 1), allowable_values=['0', '1'], blanks=[])
+        self.fields['B1NOT'] = nacc.uds3.Field(name='B1NOT', typename='Num', position=(72, 73), length=2, inclusive_range=None, allowable_values=['95', '96', '97', '98'], blanks=['Blank if Question 6b B1SUB = 1 (Yes)'])
+        self.fields['LANGB4'] = nacc.uds3.Field(name='LANGB4', typename='Num', position=(75, 75), length=1, inclusive_range=(1, 2), allowable_values=['1', '2'], blanks=[])
+        self.fields['LANGB5'] = nacc.uds3.Field(name='LANGB5', typename='Num', position=(77, 77), length=1, inclusive_range=(1, 2), allowable_values=['1', '2'], blanks=['Blank if Question 8b B5SUB = 0 (No)'])
+        self.fields['B5SUB'] = nacc.uds3.Field(name='B5SUB', typename='Num', position=(79, 79), length=1, inclusive_range=(0, 1), allowable_values=['0', '1'], blanks=[])
+        self.fields['B5NOT'] = nacc.uds3.Field(name='B5NOT', typename='Num', position=(81, 82), length=2, inclusive_range=None, allowable_values=['95', '96', '97', '98'], blanks=['Blank if Question 8b B5SUB = 1 (Yes)'])
+        self.fields['LANGB6'] = nacc.uds3.Field(name='LANGB6', typename='Num', position=(84, 84), length=1, inclusive_range=(1, 2), allowable_values=['1', '2'], blanks=['Blank if Question 9b B6SUB = 0 (No)'])
+        self.fields['B6SUB'] = nacc.uds3.Field(name='B6SUB', typename='Num', position=(86, 86), length=1, inclusive_range=(0, 1), allowable_values=['0', '1'], blanks=[])
+        self.fields['B6NOT'] = nacc.uds3.Field(name='B6NOT', typename='Num', position=(88, 89), length=2, inclusive_range=None, allowable_values=['95', '96', '97', '98'], blanks=['Blank if Question 9b B6SUB = 1 (Yes)'])
+        self.fields['LANGB7'] = nacc.uds3.Field(name='LANGB7', typename='Num', position=(91, 91), length=1, inclusive_range=(1, 2), allowable_values=['1', '2'], blanks=['Blank if Question 10b B7SUB = 0 (No)'])
+        self.fields['B7SUB'] = nacc.uds3.Field(name='B7SUB', typename='Num', position=(93, 93), length=1, inclusive_range=(0, 1), allowable_values=['0', '1'], blanks=[])
+        self.fields['B7NOT'] = nacc.uds3.Field(name='B7NOT', typename='Num', position=(95, 96), length=2, inclusive_range=None, allowable_values=['95', '96', '97', '98'], blanks=['Blank if Question 10b B7SUB = 1 (Yes)'])
+        self.fields['LANGB8'] = nacc.uds3.Field(name='LANGB8', typename='Num', position=(98, 98), length=1, inclusive_range=(1, 2), allowable_values=['1', '2'], blanks=[])
+        self.fields['LANGB9'] = nacc.uds3.Field(name='LANGB9', typename='Num', position=(100, 100), length=1, inclusive_range=(1, 2), allowable_values=['1', '2'], blanks=[])
+        self.fields['LANGC1'] = nacc.uds3.Field(name='LANGC1', typename='Num', position=(102, 102), length=1, inclusive_range=(0, 1), allowable_values=['0', '1'], blanks=[])
         self.fields['LANGC2'] = nacc.uds3.Field(name='LANGC2', typename='Num', position=(104, 104), length=1, inclusive_range=(1, 2), allowable_values=['1', '2'], blanks=[])
         self.fields['LANGD1'] = nacc.uds3.Field(name='LANGD1', typename='Num', position=(106, 106), length=1, inclusive_range=(1, 2), allowable_values=['1', '2'], blanks=[])
         self.fields['LANGD2'] = nacc.uds3.Field(name='LANGD2', typename='Num', position=(108, 108), length=1, inclusive_range=(1, 2), allowable_values=['1', '2'], blanks=[])
@@ -85,7 +86,6 @@ def __init__(self):
         self.fields['LANGE3F'] = nacc.uds3.Field(name='LANGE3F', typename='Num', position=(150, 150), length=1, inclusive_range=(1, 2), allowable_values=['1', '2'], blanks=[])
         self.fields['LANGCLS'] = nacc.uds3.Field(name='LANGCLS', typename='Num', position=(152, 152), length=1, inclusive_range=(1, 2), allowable_values=['1', '2'], blanks=['Blank if Question 27b CLSSUB = 0 (No)'])
         self.fields['CLSSUB'] = nacc.uds3.Field(name='CLSSUB', typename='Num', position=(154, 154), length=1, inclusive_range=(0, 1), allowable_values=['0', '1'], blanks=[])
-        self.fields['CLSSUB'] = nacc.uds3.Field(name='CLSSUB', typename='Num', position=(154, 154), length=1, inclusive_range=(0, 1), allowable_values=['0', '1'], blanks=[])
         self.fields['B2LSUB'] = nacc.uds3.Field(name='B2LSUB', typename='Num', position=(156, 156), length=1, inclusive_range=(0, 1), allowable_values=['0', '1'], blanks=[])
         self.fields['B2LNOT'] = nacc.uds3.Field(name='B2LNOT', typename='Num', position=(158, 159), length=2, inclusive_range=None, allowable_values=['95', '96', '97', '98', '99'], blanks=['Blank if Question 28b B2LSUB = 1 (Yes)'])
         self.fields['B6LSUB'] = nacc.uds3.Field(name='B6LSUB', typename='Num', position=(161, 161), length=1, inclusive_range=(0, 1), allowable_values=['0', '1'], blanks=[])
diff --git a/nacc/ftld/ivp/builder.py b/nacc/ftld/ivp/builder.py
index 61aaaeb..b617691 100644
--- a/nacc/ftld/ivp/builder.py
+++ b/nacc/ftld/ivp/builder.py
@@ -125,12 +125,12 @@ def add_z1x(record, packet):
         Z1X.B6LNOT  = record['b6lnot']
     except KeyError:
         try:
-            if record['lbudspch'] is not None:
-                Z1X.B2LSUB = '1'
-                Z1X.B2LNOT = ''
-            if record['lbspcgim'] is not None:
+            if record['lbudspch'] in ['0', '1']:
                 Z1X.B2LSUB = '1'
                 Z1X.B2LNOT = ''
+            if record['lbspcgim'] in ['0', '1']:
+                Z1X.B6LSUB = '1'
+                Z1X.B6LNOT = ''
         # And leave the LBD fields blank if the project does not contain the
         # LBD module
         except KeyError:
diff --git a/nacc/redcap2nacc.py b/nacc/redcap2nacc.py
index 983a0f2..94f3009 100755
--- a/nacc/redcap2nacc.py
+++ b/nacc/redcap2nacc.py
@@ -167,7 +167,7 @@ def check_for_bad_characters(field: Field) -> typing.List:
     return incompatible
 
 
-def check_redcap_event(options, record) -> bool:
+def check_redcap_event(options, record, out=sys.stdout, err=sys.stderr) -> bool:
     """
     Determines if the record's redcap_event_name and filled forms match the
     options flag
@@ -230,7 +230,7 @@ def check_redcap_event(options, record) -> bool:
             form_match_z1 = record['fvp_z1_complete']
         except KeyError:
             form_match_z1 = ''
-            record['ivp_z1_complete'] = ''
+            record['fvp_z1_complete'] = ''
         form_match_z1x = record['fvp_z1x_complete']
         if form_match_z1 in ['0', ''] and form_match_z1x in ['0', '']:
             return False
@@ -256,7 +256,7 @@ def check_redcap_event(options, record) -> bool:
                     if followup_match in ['', '0']:
                         return False
                 except KeyError:
-                    print("Could not find a REDCap field for TFP Z1X form.")
+                    print("Could not find a REDCap field for TFP Z1X form.", file=err)
                     return False
     elif options.tfp3:
         event_name = 'tele'
diff --git a/setup.py b/setup.py
index dbfff76..15bc630 100644
--- a/setup.py
+++ b/setup.py
@@ -6,7 +6,7 @@
 
 from setuptools import setup, find_packages
 
-VERSION = "1.8.0"
+VERSION = "1.8.1"
 
 setup(
     name="nacculator",
diff --git a/tests/test_skip_optional_forms_ftld.py b/tests/test_skip_optional_forms_ftld.py
index c484a51..31347da 100644
--- a/tests/test_skip_optional_forms_ftld.py
+++ b/tests/test_skip_optional_forms_ftld.py
@@ -14,7 +14,7 @@ def test_a3a_ivp_skip(self):
 
         expected = record['ftdothis']
         result = ivp_builder.build_ftld_ivp_form(record)
-        self.assertEqual(expected, result['FTDOThIS'])
+        self.assertEqual(expected, result['FTDOTHIS'])
 
     def test_a3a_fvp_skip(self):
         """ If the FVP A3a is not present in the csv, it should be skipped
@@ -24,7 +24,7 @@ def test_a3a_fvp_skip(self):
 
         expected = record['fu_ftdothis']
         result = fvp_builder.build_ftld_fvp_form(record)
-        self.assertEqual(expected, result['FTDOThIS'])
+        self.assertEqual(expected, result['FTDOTHIS'])
 
     def test_ivp_b3f_not_skipped(self):
         """ Form B3F is required and should never be skipped. """