Bearing bracket for darwin Z-axis mod

This is for a modified version of the Darwin\'s Z-axis. You can put it on 3 threaded rods instead of four to reduce the risk of over constraining the build platform (that you have with four). This is for the same reason why a tripod is always stable, but a four legged table will wobble on un-even surfaces unless the legs are adjusted.

I\'m hoping that the Z-axis will run more smoothly (less resistance from running it through the M8 nuts and less inertia (1 rod less). You need two of these par