id just use axbb-e now too. get the machine making money- you will pay for the axbb in a day!
although every 400eth ive put in peoples machines has just used the £4 chinese break out boards and has worked fine.
i also used 3 of them in my rye conversion on uc300 eth
isolated inputs etc and analogue 0-10v from pwm.
to be fair. ive used cncdrive break out boards on other machines and they are much easier-- much nicer to work with!