This is a remix from one of my other remixes. I removed a portion at the bottom that could restrict some calipers. This should be a more universal fit.
Let me know what you think of it.
UPDATE 5/11/2018: I uploaded a new version (V2). Some people who used Simplify 3D were having issues with an earlier version because of multiple bodies being in the model. V2 should fix that issue as it is only 1 solid body.
I also changed the jaw shape a bit to facilitate removing and placing the calipers on the jaws. Let me know if you have any suggestions.