Ergonomic Driver Handle Like Wera

I needed a stubby screwdriver and must have been bored or broke... So I found inspiration from my favorite hand tool design concept and modeled up a handle to hold 1/4" Hex type driver bits. Liked it so much I went ahead and made the larger size too.

Previously I had printed UncleFrankSays version and incorporated his collet thread design.
https://www.thingiverse.com/thing:4620492

Note: The regular sized handle has small protrusions within that lock into the grooves in impact driver bits but the stubby one does not. I'm still on the fence about them.