in/out calipers pip

Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:2416097.

print in place calipers. you will need to do some careful separating the sides a bit. i was worried it wasnt going to separate, but i carefully used a blade to reach in between the sides especially near the rotating axle area. but you see my results. i used 32% infill. but lil more wouldnt hurt.