our team just got done installing a 4 stage "firemans ladder" lift utilizing these drawer slides
http://www.menards.com/main/home-dec...952-c-9337.htm
Our design has 2 fixed 1"x1"x14" aluminum tubes attached to the chasis on the outermost edges, then alternating between slider and tube for 3 more layers such that there are 3 moving sections on each side. So, there is a total of 6 drawer slides (3 on each side).
The biggest issue we found is the weight of the drawer sliders.
We have ordered a set of igus DryLin NW-27 sliders and corresponding shuttle cars. As soon as they arrive, we'll swap out the drawer sliders for those, and I'll post our results.
- FTC Team #6389