The D-Deck and ELS-01 or 2C have a feature to actually automatically change regs if programmed to do so(by measure and beat). So you can use the right foot switch or the auto function. We can use a foot sw. on an arranger the same way.

Bachus I have never heard any Lowrey sound as good as the Yamaha's. The Roland's do sound great as well...

Marco is outstanding, and the D-Deck he is playing is only $7,200 including shipping.....Your right they are not the same as a Arranger TRX type setup, but that setup does afford some of us a lot of capability for the $$.
I really hate being limited on a 61 note to have a very small area for LH chords and sounds.

It would be cool to see and compare Marco playing a TRX type setup compared to the organ...Wish there were more demos of the TRX approach by great players.

Anyways.... this is an arranger forum, so I am more interest in what we can do from that approach.