Anti wobble Z Axis for Geeetech I3 Pro B

This is a remix of Bernbout thing. Thank's to him (or her) !

I had to remix because the linear ball bearing guide of the soft rod of the Z axis was touching the part, instead of the base of the Z carriages.

If you have the Geeetech Prusa I3 Pro B Acrylic, that thing fits directly.

You'll have to print 2 parts, of course