About this 3D model

To stiffen the z-axis of a printrbot3droid, turn the z-bearings up-side-down and print two of theese to mount them directly on the bearings to help support the bed. The "backplate" is trashed. This is not a complete fix, but it helps quite a bit. The part must be printed with support. It mounts like in the pic. The bed is blue - bearing is red and the printed part is green.