My BL Savage

So it looks like I'm going to get a miniature mill next month. I'm now planning on doing all/most of the drawing in Solidworks, then printing out templates for me to mill the pieces manually. If I was going the CNC route like I originally intended, I'd spend a comparable amount of money for a one time deal, so I think that this is the better choice. Sure the CNC parts would look nicer, but getting a mill would allow me to expand on the design/repair/change the design(s) without costing me a fortune.
I have a question though.. does anyone know which parts are used in the Slipperential that Mike used to sell for the G3 Revo. I see it has the revo slipper, then an idler gear of sorts? If anyone knows, it'd be helpful.

Thanks!