This one works very well in my setup, but I´ve got a slight suspicion that the timing might be off in others. Please let me know if this is true.
If anybody can inform on the SysEx structure of the SY22 (beyond what the manual says), I would be mucho grateful (and you´ll get a better protocol...). At present, the timing on this thingy is, to say the least, fiddly.
The transfer is initiated by pressing the patch buttons on the Juno, after putting Music-X into "Receive" mode.