Spacer for Openbuilds Carriage, a openscad script with function to adjust length, close tolerance of screw and exccentric nut. All for M5 dimensions.
I used it to test out dimensions for the spacer on openbuild carriage, to change them later with precise length to metalic spacer.
http://www.thingiverse.com/thing:43394 the v-wheel used on photo
http://www.thingiverse.com/thing:24886 used for basic idear
thx to all have fun
used ABS, but PLA should be fine as well