Jack, I?m sure everyone completely understands your situation with Py menu. You made it primarily as a more aesthetically pleasing, elegant and simplified front end for your own personal RS-97 and then thankfully shared it with the world for free.
Then, these new units came out that you don?t have and aren?t likely to get which have new features that the RS-97 didn?t. You?ve tried to help those who wanted to try Py menu on those devices where you could but without knowing the devices the same way you do the RS-97 and with so many other things going on (multiple versions of the RS-97 exist as it is already) it?s completely understandable that you won?t be able to provide support for all of the devices that could possibly run it so that all main features work and that even if you wanted to try and help with that... replies will obviously be delayed since this is complimentary work you?re doing on the side of everything else you have on the go.
Put simply, you (and all of the developers here) don?t owe us anything but your work here is great and has already started to spread and will continue to as more discover it because it really modernizes and simplifies how the RS-97 presents. Thank you for your efforts!