Adjustable Geeetech Y motor holder

The Geeetech i3 Pro B is a nice entry level printer, but the frame is made from acrylic which is prone to cracking.
One of the more fragile parts is the Y axis motor holder, which will crack if tightened just a bit too much.
It's also a bit short, meaning that when it's fully seated the motor sits at an angle.
Another problem with the original mount is that it will not make the belt level with the mounting point on the bed.

This part is an easy print that solves all of the above problems.