Im building the Edgge 3D Printer 1.0(http://www.instructables.com/id/Edge-3D-Printer-an-affordable-open-source-3D-print/) and stumbled upon a problem. Im missing a 3D file , but got spare. The missing part is supposed to hold 2 bearings that press the belt against the pulley.
But its missing in the 3D Parts list. Instead i got a part that i cat fit in anywhere

I allready conntacted the "publisher" but he didnt respond to me.
In whole the printer looks like this