Threading Jig for Die / Die Holder

I needed to tap a 10mm rod for my toolbox droid. It's tough to align the die by hand, so I made this jig to fit my Harbor Freight Tap & Die set.

I was inspired by Deemoss's Threading Die Guide, but I didn't really use any of it. His seemed a bit complex to me, but I immediately discovered a problem with mine - it's easy to push the holder/guide off of the die! Deemoss's solves that by having a back cover - oops. It worked OK for the 8 ends I had to do though.

I got really paranoid wh