y carriage for mendelmax 1.5

remixed from https://www.thingiverse.com/thing:295006/files modified to be printed on a regular size hotbed.

found out its for lm12uu bearing, also it has a problem with the bearing edges lifting during printing with pla.

i printed thinking it would work for prusa i3 aswell but it was 1/2 inch too short where the bearings go. https://www.thingiverse.com/thing:2950592