SC12LUU holder 3030

this is an extra long bracket that holds a SC12LUU and it's shorter version together to give a long linear bearing for a 12mm rod supporting the build plate to glide along, this reduces the rock on the build plate frame, if you swap out the bearings for igus or similar then then movement is drastically reduced. you bolt the bearing blocks on the rear of the plate and then bolt the whole assembly to 3030 extrusion using 6mm bolts