Has anyone used the Futaba brand 3PK syntheizer modules in a 3PJ or 3PJS?

If you ask Futaba (I have) they tell you the modules are designed only for the 3PK. I know for a fact (since I am doing it) that the Hitec 75MHz Spectra module (not to be confused with Spektrum) works in the 3PJS and that other prople have reported it working in the 3PK. So has anyone used the Futaba brand synthesizer modules in a 3PJ or 3PJS?

I use that same module (pk-fsm) in my 1024 (FP-T3PB). I know it's older than the 3PJ and works flawless.