there is a minimum thickness that still allows for proper length lugs. 1.25 is just fine.
Spidertrax makes quality stuff. whatever brand you get, make sure they are hub-centric and not cheapie stuff.
if the CAD is unlocked, the ring gear spins, the spider gears do their thing and all the force from the driveshaft is transmitted to the inner half of the pass axle shaft which spins furiously but the power goes no where.
might be time to verify the gear ratios.
the fork won't stay put forever. you need to either flip the housing or use a hose clamp on the shaft to keep the collar in place.
success! I had a burnt out motor, but as it so happens I grabbed a spare from the junkyard so all is well. if anyone was curious, the motor/gear assembly doesn't swap left to right, but the motors themselves can be popped out and swapped.
next up: ABS computer swapping
the vacuum actuator (CAD: central axle disconnect) is a super common failure point. see the link in my sig for a couple writeups on how to bypass it and never have that problem again.