77mm lens cap holder

When I first got my 3D printer, I found a variation of kitlaan's Camera Lens Cap Holder was perfect
for my needs with a 77mm lens cap and the 1" webbing of a Black Rapid strap.

Well, eventually, that print broke and I realized that it had fatigued right where one of the little
arms hooks around the strap. So, I sat down to make a few improvements:

* Thicker strap arms
* Tapered transition from strap arm to body for a cleaner look and better reinforcement
* Tapered underside to allow a