diff --git a/packages/iris-grid/src/IrisGrid.tsx b/packages/iris-grid/src/IrisGrid.tsx
index b91d8e544..408ed2ab7 100644
--- a/packages/iris-grid/src/IrisGrid.tsx
+++ b/packages/iris-grid/src/IrisGrid.tsx
@@ -3723,13 +3723,15 @@ class IrisGrid extends Component<IrisGridProps, IrisGridState> {
    */
   deleteRanges(ranges: readonly GridRange[]): void {
     const { model } = this.props;
-    if (isDeletableGridModel(model) && model.isDeletable) {
-      this.pending.add(model.delete(ranges)).catch(e => {
-        if (!PromiseUtils.isCanceled(e)) {
-          log.error('Unable to delete ranges', ranges, e);
-        }
-      });
+    if (!isDeletableGridModel(model) || !model.isDeletable) {
+      throw new Error('Model does not support deleting ranges');
     }
+
+    this.pending.add(model.delete(ranges)).catch(e => {
+      if (!PromiseUtils.isCanceled(e)) {
+        log.error('Unable to delete ranges', ranges, e);
+      }
+    });
   }
 
   resetColumnSelection(): void {
diff --git a/packages/iris-grid/src/IrisGridTableModelTemplate.ts b/packages/iris-grid/src/IrisGridTableModelTemplate.ts
index 1ea7f7acc..11e2ebf16 100644
--- a/packages/iris-grid/src/IrisGridTableModelTemplate.ts
+++ b/packages/iris-grid/src/IrisGridTableModelTemplate.ts
@@ -3,6 +3,8 @@
 import memoize from 'memoize-one';
 import throttle from 'lodash.throttle';
 import {
+  DeletableGridModel,
+  EditableGridModel,
   EditOperation,
   GridRange,
   GridUtils,
@@ -52,9 +54,12 @@ export function isIrisGridTableModelTemplate(
  */
 
 class IrisGridTableModelTemplate<
-  T extends DhType.Table | DhType.TreeTable = DhType.Table,
-  R extends UIRow = UIRow,
-> extends IrisGridModel {
+    T extends DhType.Table | DhType.TreeTable = DhType.Table,
+    R extends UIRow = UIRow,
+  >
+  extends IrisGridModel
+  implements DeletableGridModel, EditableGridModel
+{
   static ROW_BUFFER_PAGES = 1;
 
   seekRow(
@@ -1722,8 +1727,11 @@ class IrisGridTableModelTemplate<
    * @param value The values to set
    * @returns A promise that resolves successfully when the operation is complete, or rejects if there's an error
    */
-  async setValueForRanges(ranges: GridRange[], text: string): Promise<void> {
-    if (!this.isEditableRanges(ranges)) {
+  async setValueForRanges(
+    ranges: readonly GridRange[],
+    text: string
+  ): Promise<void> {
+    if (!this.isEditableRanges(ranges as GridRange[])) {
       throw new Error(`Uneditable ranges ${ranges}`);
     }
 
@@ -1860,7 +1868,7 @@ class IrisGridTableModelTemplate<
     }
   }
 
-  async setValues(edits: EditOperation[] = []): Promise<void> {
+  async setValues(edits: readonly EditOperation[] = []): Promise<void> {
     log.debug('setValues(', edits, ')');
     if (
       !edits.every(edit =>
@@ -2054,11 +2062,11 @@ class IrisGridTableModelTemplate<
     }
   }
 
-  editValueForCell(x: ModelIndex, y: ModelIndex): string | null | undefined {
-    return this.textValueForCell(x, y);
+  editValueForCell(column: ModelIndex, row: ModelIndex): string {
+    return this.textValueForCell(column, row) as string;
   }
 
-  async delete(ranges: GridRange[]): Promise<void> {
+  async delete(ranges: readonly GridRange[]): Promise<void> {
     throw new Error('Delete not implemented');
   }