CoreXY x FT5 carriage

An open platform more similar to what the FolgerTech 5 printer has for for the CoreXY v2.0 frame.

Tip for installing belt:
-install one side with minimal excess sticking out on sides
-pull the other sides though a partially screwed down clamp
-screw down top until it pinches the belt, and then do the same for the bottom
-pull belts tight and screw down top and bottom more
-repeat until belt can't move anymore and belt holder caps flush with carraige