Thanks Edward. I wondered about the compatibility of the RF signals between the remotes. Since there seems to be some sort standard to them, I may give the URC-100 a shot since I can get it without the base (the MX-600 can only be had with the MRF-100 so that is part of the cost). If the URC-100 RF signals works with the base station I have, I can save some money.

I still what to get a JP1 enabled remote so I can get access to some of the discrete codes I am looking for. Have to get a cheapy so I can teach the other remotes.

Thanks
Ernie