Designed a printable version of my favorite vintage movement holder vise - interested in feedback

[TimpanogosSlim]

I bought an anonymous 4-sided wristwatch movement vise on ebay over 10 years ago. "GERMANY" stamp on the thumbscrew and "GH" awkwardly engraved on both dies. 

I like it a lot better than most of my other movement holders, so, I threw together a 3d printed version in hopes that others might find it useful. 

The main innovation vs. most others is that the dies are slightly undercut where they grip the main plate, which seems to greatly improve their ability to hold on. 

https://www.thingiverse.com/thing:5275367

[TimpanogosSlim]

And a similar vise for 16, 17, 18, and 19 ligne pocket watch movements. 

https://www.thingiverse.com/thing:5279657

[TimpanogosSlim]

It looks like vises similar to the one i based the wristwatch movement holder on were sold branded by Moseley and by C&E Marshall, but typically signed? I also spot a plastic vintage version signed "MRS". 

I guess it doesn't matter where the design came from originally.