HyperCube belt tensioner

X Carriage for Hypercube with adjustable belt tensioner.
Belts can be adjusted independentlyfor X and Y.
X Carriage is also redesigned at the portion where the belt tensioner adapts to reduce the overall height not to protrude from the dual bushing holder.
Further x-end switch mounting platform has been narrowed so the endswitch doesn't interfere with the belt and beltclips.