Scrap Copper Wire Stripper Block

Update: 7/25/19 Removed excess part. Made it more printer/material friendly, removed bulk, shortened the path for the wire to get to the blade, should make for easier loading & pulling. Added 2 new 3.5mm diameter through holes in the bottom & rear to better support the assembled structure.

Story:
We (wife and I) found a large pile of stranded copper wire in a scrap pile. The outer diameter is around 3.2mm so we decided to start stripping the sheathing and recycle the copper.
If you don't have a machine to strip wire, it gets tedious & painful.
We tried wedging razors in wood with a hole drilled through to guide the wire with limited success.
After shifting & sliding, the blade kept getting out of position causing more repair than stripping so I came in & opened TinkerCad to put in some work.
I'm really novice at modeling, and I haven't (at the time of this writing, will update later) printed it yet.
Assembly Notes:

It will require M3 machine screws and matching nuts to asse