Ordered this today:
US SHIP Wantai 1AXIS Nema34 Stepper Motor Dual Shaft 1600oz 3 5A 151mm CNC | eBay
Looks the same as Roadster used.
I emailed Chai last week but no response yet? Tempted to buy this on ebay:
Ballscrew 2005 1200mm Diameter 20mm Pitch 5mm L 1200mm ballnut BK BF15 | eBay
Longer than 45" and 20mm dia. I'm starting with the X.
I am so impressed with this 12Z mill and Charter Oak Co. I have modified Z with an adapter to the HF "Hole Hawg" drill clone which works great to save my arm. I built an air powered draw bar with the HF butterfly air wrench. Had to just sit and change tooling several times to
make sure I wasn't dreaming. Wound up doing what I said I wouldn't and just milled a couple of logs into a "Lincoln Log" (12 X 12 X24) two on each level crossed, stand since I would rather spend money on the conversion.