I don't know anything about the Megatech equipment, but some of the folks on here might. Perhaps a photo might help. The place in Ohio. Is that M&M? They are good, but if you have to take the coach there, that's not a good choice unless you can make a nice vacation out of it. I'm surprised they couldn't have you send them the device and them take it from there.
Did you try NW RV Supply in Oregon, or PPL in Houston? It looks like Teleflex bought Megatech, and they have online information. Perhaps they could guide you?
Jim & Angie, Boise, ID
2006 Monaco Dynasty Countess III
2017 GMC Acadia Denali