Slotted Blade Handle

After struggling to find a handle for this less common razor type, I designed one myself.
Its fairly minimal, but has worked great so far. It features an anchor slot on the end to keep the tip steady, and a tab on the back to help remove the blade. Should work for square and rounded "slotted slitter" blade types.
I also included the slotted blade model and STEP files to help with remixes.