I read this about requesting sysex dumps;
http://www.ucapps.de/mios/mios_backup.txt
So I send the following and it works fine;
F0 00 00 7E 40 00 01 00 00 20 00 F7
To request the dump from the core with device ID 01 I would need to change a 00 to a 01 somewhere in that string correct - if so where would that be?