Every once in a while I bump into something that just flat amazes me. Delrin is an AWESOME plastic for machining and is very VERY slippery. I just ran across this how-to for using an ACME leadscrew and making a delrin bushing to mate with it.
I dunno bout you, but the Delrin cut-off bin at our local plastic supplier sells the stuff four about $.35 a lb.
So, does this excite you? It makes me kinda giddy.