Summary

This is a sub module of thing: https://www.thingiverse.com/thing:2832658

• 4 type track for selection.
• tight version chained with M3 12mm-15mm screw, no Nuts. (or longer screw with nuts)
• not verified yet, but hole to hole space is same. should be ok.
• SCAD ready and built your own design.

You need this library to running the module:
https://www.thingiverse.com/thing:2832698

Compatible with Tri-track bot:
https://www.thingiverse.com/thing:19170

change log

2018/6/7 uploading track-B-vert, printed vertically, with support. vertical print is prefer for good precision and very strong link, strong enough for speed run.