Based on the pictures I"ve seen, yes, that seems to be the case. Check this video... lots of pics of the module, but also, at about 52 seconds in, you can see the PA1000 with its brain removed, still otherwise quite intact. It looks like the tinkerer added some multi-pin connectors to facilitate being able to reconnect and disconnect the brain from its original housing on a whim.




That is an indeed an option I am considering. The hesitation is that I already have and use the PA1000, I already know how to get what I need out of it, I love its sounds, and I have lots of songs already set up on it. So it would be gig-ready, as opposed to my learning a new device, hoping to find sounds I like as much, and programming the songs into it.

It's not even really the accompaniment styles that matter per se... I only use their drum rhythms, nothing else. Everything else, I play live. But the combination of a particular drum rhythm (with its variations) with the various split/layered keyboard-playable sounds and their relative volumes, is a lot to have to set up again from scratch for each song.

(I also do more than the basic "1 sound on bottom, up to 3 sounds on top" layer/split arrangements; I do a good amount of assigning the up-to-3 sounds on top each to different key ranges. I don't even know whether the Roland is capable of that, off-hand.)