Yes, once everything is mapped, the mapping isn't very interesting anymore, but I'm thinking of the initial set up of the mapping. So when somebody downloads a MIDI Target definition file, he or she maybe has to set up the corresponding device manually.
Thanks for the reminder of the developer mode. I forgot about it...
But it doesn't display the assigned MIDI messages, does it?
Here it shows something like [0xfffd].
I'll post more ideas soon
By the way, did you get my PM?