Huey edge slide.

thingiverse

After 3 versions the edgeslide should be stable both mechanical and version wise.http://youtu.be/0r5rYepdS4I I initially had rough travel on one axis and couldn't really pin down the cause. Using dual bearings and moving the belt attchment to be inline with the shaft may have helped but I can't say for certain.http://nerdipedia.com/tiki-index.php?page=huey Instructions The main part needs to be printer standing on end. The other part is printed in the same orientation so it mates well. Both have built in support. I tried both ABS and PLA and found the ABS distorted. There is an optional nut for screwing down the shaft. My prints were so tight I haven't needed it. The nut is a M3 flower nut. These come in at least two sizes and I've used a large one - about 5mm across.