Elevator/Telescopic Arms & Motors to Use

[Phyrxes]

Pneumatic tubing can be purchased that is already coiled or you train it around a large diameter pipe (sewer pipe works for this) with a bit of work. I've even seen teams just create a bundle, occasionally wrapping it in some sort of protective material no slip mat seems popular, and using rubber bands or other elastic material to attach it at several points.

The plastic chain from the KOP is provided by Igus and is called "energy chain."

[MARS_James]

To answer your question about stopping it from over extending we used a string potentiometer. It is easy to program and our oldest use of one was 2005 and it still works