About this 3D model

I could not find a dial indicator mount that was easily printable and would accurately mount on my extruder (not sure if they changed the design recently) so I designed my own. It uses magnets to keep the mount stable on the extruder, but locates itself by hugging onto 3 bolts on the outside of the extruder. For reference, my SD3 bed had 0.31mm variance between the high and low point on the bed. Magnets used. (6.2mm OD) http://www.amazon.com/dp/B001KV9RAW Dial indicator used http://www.amazon.com/dp/B006YD7G36