drag chain mount update for openbuilds workbee cnc and 18x37 chain —

Founded drag chain mount update for openbuilds workbee cnc and 18x37 chain models & stl files for printing
Vex chain
Greaser57
Ditto key chain
KiMulaa
Chain Support Free
PrintitAnyway
CNC Clamp
Tyler Winegarner
Chain
ON5MF
Chain test
el10t