Cool cool!
I own a Roland XV-5080 which is a bit like like a JV-xx, only with more sounds. I hope it will be possible to define your way of editing patches/banks/rhythm sets. There's a great page that explains the somewhat convoluted hierarchy employed by the JV-90, most likely all JVs, XVs, Fantoms and "new Jupiters"/Integra etc. It would be interesting if it was possible to define text lists on the SD-card with default patch/wave/drumkit names for the various expansion boards since some of these synths address these cards depending on the slot the card is installed in. That way it would become possible to load sysex, change the destination card slot to fit your particular synth and upload it.
I haven't looked, but I assume that there's a similar story for Yamaha Motifs, Korg Tritons, Kurzweils, Ensoniqs and E-mu boxes from the 90's onward. If someone was ambitious he or she could make a programmer for an MR-Rack, a Fantom-XR, a Motif-XS or... Well. Lots of work :frantics: