WanHao Duplicator I3 Ratcheting Belt Tensioner modified knob

Remixed the ratcheting knob, recessed the screw hole an extra 3mm and flared the opening. This was so i could use a m3 20mm screw commonly available at hardware stores instead of 25mm which i could not find anywhere locally.

While i was at it a created another version with a shorter knurled surface, if anyone finds that useful.