Here are some comments from Daniel:
I’m using various things for my console (see attached photo as 3 man and then as 4 man).
The Keyboards are dismembered Yamaha Keyboards set into a wooden frame.
The pistons run on two separate boards. Just over half run on a classic organs board by Ron Coates.
The rest run on a dismembered E-Keys keyboard.
Thanks Daniel for allowing us to post these.