A Rework of : http://www.thingiverse.com/thing:302633 I changed the design a bit, added support, should print without warping, Mine did! Print at 25% infill at .2mm layer height for best results. Also added a stl for bearing extensions for 608ZZ bearings so you can use smaller spools on it. Branded with my Business Name, MakerFront. Cheers!This is set up for 8x30mm bolts and 608zz bearings. Parts List (as I used): 6x 8mmx30mm bolts 6x 1/2 nuts for 8mm bolts 8x 6mm washers 4x 608ZZ Bearings The bearing extensions are press fit, make sure the bearings are flat in there to limit wobbling.