OEM LED 805 has an on/off history of working in recent versions of Mach, depending on the version you have you may wish to try a slightly older one, think I use 027 on the mill and it works fine.
Spindle I dont have a clue why its not working, you said in the viewer you see it working, is that the Brains you are meaning? If yes then does the possibly the spindle speed override DRO is different in the standard turn screen.
Hood