There should not be anywhere that the old 2 wire PT and the newer
2 wire Hybrid should not work. Unless they are running the really old
RC20 and that is so old I dont know what scoring program you could
even get to run with it.

2 wires work fine with the new RC4
MRC will not. That was part of the RC4 upgrade
plan. That is why they cost 100.00, no competition.
As soon as AMB started realizing MRC and others where
moving in they created the RC4 upgrade and offered it
at an almost give away price. And the sheep just lined up.
If your track is running RC4 they are part of the reason that
PTs cost 100.00