Bosch Rexroth extruded aluminum with Ecoslide carriages served as our (winch-driven) cascade lift in Overdrive and our (lead-screw-driven) robot lifter in Breakaway.
http://www13.boschrexroth-us.com/Fra...t.aspx?units=1
It was almost shameful how little manufacturing capability we needed to create either device, and both worked exactly as we designed them to. (Mind you, we've learned some about design in both cases, and would make them even better now -- but still might use these products.)