Drag Chain with mounts

A Parametric Drag Chain that's customisable using the customizer.
The chain is designed to be printed assembled. You can choose to print any number of links, and whether to include the chain mounts.
The performance of this chain compares admirably to that of commercial chains. https://www.youtube.com/watch?v=TQgd3H_QV24

This has been updated (May 26 2017) to include two new parameters, link_xtend allows one to produce longer extended links, and pin_release adds a small chamfer onto the pins to assist with assembling multiple segments.

Small request, if you like this please vote for it in our local competition
https://site.rapdasa.org/design-competition/?contest=photo-detail&photo_id=7391