Kossel Carriage, integrated belt clip and screw for endstop

This is a carriage designed for my delta printer, which i am building at the moment.
Should be used togehter with http://www.thingiverse.com/thing:2301009

"V2":
- The two holes for the M3 nuts are deeper. So i can use these parts:
https://www.3dware.ch/Kugelgelenk--M3-auf-M3-6-Stk.-De.htm
- The thing has a 20mm deep hole for M3 screws to adjust the endstop.
- You can clip the GT2 belt together, like i did oder put the lose end in the slot whit the printed GT2 profile. The profile is the