Well! while you can connect a second keyboard to a T5 & a PA4x, they are not that good as an organ to play live, as they don’t have dedicated organ features, (This is the reason most true organ players don’t use them) however for arranger players that want to play a bit more themselves, (Rather than playing along to a style) they are a good option.

An organist uses both hands and feet to play, and styles just get in the way, hence if you hear a style used it has been simplified with just drums and the occasional vamp track, thus styles are not really a priority. (Although good styles do help arranger players in transitioning to organ playing)

I have no idea why solitaire is going to all that trouble, as if he wants Ketron styles it would be much easier (And cheaper) to convert them to T2 format and Midi an SD1000 to his organ, or do like Franz Lambert has been doing for decades, and have a Ketron module by the side. (The weak spot on Wersi has always been the drum sounds, which are no better than you get on a Yamaha, (Which fall well short of Korg, Roland and Ketron) however by using 3rd party samples or VST, this can be addressed)

I never said Arrangers don’t advance, just that they are at least 1 generation behind the pro world.

Bill