might be complex, but the JD990 layout could be a very good starting point?
Thanks for the update. I do have an XV5080 and the Editor does indeed show the Sysex string for each control, but the problem with this being a simple solution is each control actually sends two values. The values in (rough) MD Sysex parlance would be something like: F0 41 10 00 10 12 1F 00 20 49 V V F7 - to change the Filter cutoff in "Patch Mode."
How would one go about achieving this in Midi Designer? I imagine Supercontrols would be useful, but I haven't invested much time in this layout.