I purchased parts to a Shopbot PRT from a fellow Shopbotter that didn't come with motors, gears, racks or frame. I built the gear head using 2 x 4 x 1/4 box tubing and delrin gears. It has a 4kw (5hp) china spindle with a Teco (Westinghouse) inverter. all the wires for the motors and controller are from Igus and are Shielded. The energy chain is also from Igus. I running Mach 3 as my control software with Gecko drives.
https://www.dropbox.com/sh/pdaks2b3ul9bl2s/odUfD9FxCe
Don