Ah.. regarding the PC number for the last solution you can also set the Shift key to latch mode so you could have the numerical keypad available for entering the PC commands. This is in

Edit (act and < buttons pressed together)/keyboard-pad/shift key latch
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Roland G-70, FP-4, BK-7m, SonicCell, KC-350 x 2, DS-5 x 2, A300-Pro, Sonar X1 PE, BR1600CD
Yamaha HX-1 System 1, KA-20x2