"Smartrap CoreXY"-like X Carriage with internal clamping belts (gets rid of the "in-the-way" belt clamping ears)")

See in 3D how this X Carriage is going to be included into the [WIP!] 3D printer I am designing, at Sketchfab: https://skfb.ly/LPP7

WARNING: THIS "THING" IS NOT INTENDED TO BE PRODUCTION READY!! Download and modify to suit your needs.

###__ NOTE:__ The solution I will go forward with has been chosen, namely the printed internal teeth. You can find the latest iteration of the design at http://www.thingiverse.com/thing:1505842, where I have added a tensioning system to the "earless" feature.