X-Carriage for i3 GT2 Belt with more Nut Press Fits & Wrapped Belt Install

I added press fit holders for the M4 nuts. I also added 2 new M3 holes .91 inches (23.15 mm) apart in the middle for back compatibility with a He3D x carriage. The holders for the M4 nuts may not be enough to completely tighten them but should save the need from keeping your hand back there to get them started.

This is a minor revision from the wrapped belt version this was remixed from. The wrapped toothed belt saves the need to clean up the plastic printed toothed feature that is even wor