nema 17 z axis assembly

This is a z axis assembly I use in a 3d printer of my own design it is called the VectaPrint Odessy. The build volume in my machine is 2 cubic feet. it has a glass-surfaced heated-bed. I printed these parts at 40mm per/sec. at a resolution of .20mm layer height. the parts are all reversible( they can be mirrored for use on either side) and could be used to make a single z axis for an sla printer. The assembly can be made with the included bushing if printed, but I used 608z bearings. the linear