My bet would be the MRT working fine on the RC4's. On the grounds that the current ones work with current kit, and the technology being used isn't THAT clever that it can tell what brand of PT is flashing past the loop.
Add to that...this is an AMB development and announcement that's being discussed. Why would AMB confirm or deny a competitor product working? It's not in their interest! I bet if you asked them before about the old kit they'd say they couldn't guarantee an MRT PT to work with a RC3 decoder...why would they? Not in their interest or control!
They want to sell their own PT's, and cannot make performance statements about competitor products...old or new.
I could well be wrong, but in practice, and until someone independent to AMB has tested the MRT's on an RC4, I won't be worrying.
And even then....if MRT are interested in continuing their business with PT's...expect them to be able to respond with something compatible...in time if not immediately!
Then, as a club, I'm not sure they'll be rushing out immediately to change decoders. It's a big outlay, and something that would be carefully planned and considered so that it didn't effect the day to day running of meetings and the club. The 2 clubs I help with both use MRT PT's as handout's, so wouldn't be rushing to change the setup if they don't.
My guess would be that during the transition period of this change, anyone turning up with a with a Purcy would be told they are incompatible and offered a handout...until such time as it made sense functionally and was financially viable to upgrade.
Suffice to say, the customers (who also tend to be represented at BRCA committee level with it being a democratic association) will vote with their heads and their cash and decide what works at race meetings
