Clear your pm box. Cant get thru. I did email your request.
Regarding the contactor, does the panel have a momentary push button? ( I cant remember the original panel) generally they need a momentary signal to energize the contactor and if the contactor is wired correctly it should latch. That latching wire also runs thru the EStop and IIRC it goes thru the door switch too.
My limited time with the original electronics had it working in no time but that was most likely luck. I personally would unplug every modular plug 1 at a time, inspect it, maybe blow with air and reseat each and every connector I could get my hands on. I dont remember the turret homing or measuring backlash but it has been a long time and I never used it with the stock electronics (after trying to pursue software and or dongles, of course everyone claims an answer now).