Solidoodle upgraded idler bracket (grob version)

Modification of Smitty505000's idler bracket for the Solidoodle 2 / Solidoodle 3 3D printers. I wanted to simplify the model, use a plain bore for the shaft to allow for finishing with a drill, and adapt it for use with plain 8x5x2.5mm (MR85) bearings.

Note that this is not compatible with the Solidoodle 4 (this uses a new tensioning mechanism.

Modification requires 1x left and 1x right part.

Print standing up on small squarish face. 0.2-0.3mm layer height, >=40% honeycomb infill or 10