A printable belt tensioner, with a fitting for a M3 bolt and nutThis is my first design and upload to thingiverse, please feel free to leave comments.Update 24-06-2012: Redrawn in OpenScad, added a Ram and a lip to help stop Belt from jumping off. Also a 2 sided option is in the scad file based on IcanCwhatUsay derivative http://www.thingiverse.com/thing:16721 - Just change "number_of_sides" variable at the top of the file and Belt width can be changed with variable "belt_width"