I have just recently recieved my RC4 decoder, and tonight I have mocked it up so that I can test in in the living room. In a mockup situation just passing the PT over the loop, the RC4 is registering the MRT transponder. Will this repeat itself in racing conditions? Who knows, but it looks promising. (Note: I am not talking about updated MRT transponders. Im talking about the old ones that are not supposed to read on an RC4.

Go figure.