I have another idea/request, though it may be better as a separate mod - A weapon safety switch for the engineers personal weapons.

With Distant Misfires installed (or when using the shotgun without it) I have a habit of shooting the ground, trees, buildings etc. as the weapon will fire freely at the cursor whether an enemy is there or not. Changing the bind to middle mouse avoids the issue, but force of habit always has me pressing the left-button first.

I was wondering if you would be willing to create a setting or mod to add a weapons safety keybind which would disable the ability for the engineer to shoot until toggled off "Safe".