Claw updates

* I noticed that the pointy claw can get misaligned and blocked when it retracks as first. The cap to be glued in the middle part such that retraction only happens to the bottom of this part.
* I also added strap holds to the case. (meshes are not merged, but your slicer shall most likely hide and solve that for you)
* The cap didn't fit at all for me, so made a fitting one.

The rest is to my cousin. He shall build these into his gloves and have a ball.

Find the fingers in the original thing!