The nice thing about the new Midi-Router, is that it uses the exact same leadscrew for both the X & Y-Axis!
So I used my new lathe which has been converted to an 8-station turrel lathe to run off 20 pieces of 1/2-10 Acme threaded rod!
The Acme rod is made of 1010 steel, which is really cheesy, and has a tendency to load on the tool bit and smear a rough finish. So I found a nice 7" dia x 1/2 diamond wheel on eBay, this wheel fits nicey on my surface grinder, and allows me to get my brazed carbide tool bits nice and sharp. This keen edge and a flood coolant helps me turn my diameters with a better finish, which I polish a little with a Cratex (rubber abrasive) stick.
Then I ran off a set of 10 pieces of the little Delrin Z-Axis nuts.