I ended up using a CNC4PC C32 Break out Board with a Smooth Stepper. I also used the CNC4PC Viper Connector Boards, so far so good. I also have a VFD I am using, I haven't set that part up yet, I am still working on my retrofit. The CNC4PC C32 card also has some NC and NO relays, and the ability for outputs and inputs for peripheral devices. Its worth taking a look at. Plus I wanted to have a pendant so that was another reason to get that board. Give them a ring, they are extremely helpful, and between Larry and them I have not had better customer service ever with products.