Here's a few pictures of the Lead Screw Nut that I made... I also made my own ACME tap to tap the Delrin and I will post that in it's own article :)
You can see in the pictures how the cables (to prevent the racking) are JUST missing the screw and nut! Whew - hopefully that doesn't end up causing any trouble!
Here's the pictures!
I also tested the Gantry and lead screw with my cordless drill - just to watch it :) so here's the video - sorry the quality is so poor - I promise I'll break out the nice camera soon and get some decent footage!