Nice performance
If you were to copy the variation C to A - that would do for your 1st rhythm and the voice
Then copy D to B - that gives you the D variation and the Brass voice
The copy D to C - that gives you the D variation and the 3rd percussive voice
Then you have
A = C rhythm with Percussive Voice 1
B = D rhythm with Brass voice
C = D rhythm with Percussive voice 2
Then your right hand is free to play and no need to move left hand over to change the OTS voice
On the PSR keyboards I can play the chords and just about touch the style variation buttons as I play, less mistakes along the way, you need a copy of StyleMagic’ to copy or move the style variation, Can be done in 10 seconds. Then save one "into and ending" you want to use with the song, it’s a far less confusing method than using the registration, IMHO.
Pino