RE: Why isnt my Futaba working with Jr receiver?
Its possible to swap crystals in both Futaba, and JR modules.....This is not recomended but I personally do it all the time...Do a good range test and check it out...you should be fine.
The crystals on both modules are easily accessed without tking the modules apart.
As for running a Futaba Crystal in a JR module or RX or vice versa this should not be done. As for the Shift issue I don't know but the US market is different and I suspect that on 35mhz Futaba, JR and Airtronics all may talk to each other. I don't know this for sure but it is possible.