About this 3D model

I remixed this in order to use it on my CTC (PURSA Clone) ....This one allows for carriage bolt and nut. Allows for either direction on the Y Axis. For example CTC the stop is on the left. Just flip this over. Next, CTC uses 2 long rail slides, where others use 4 small. I have printed this and tested it on my printer. This removed variations I was seeing in my prints. Not: I would still used belt springs to reduce backlash Cheers