I'd think that it's what's attached to the knob inside the electronics cavity that might be dictating their position (at least a little), in addition to all the other stuffed crammed into the instrument that has no knob to show for it!
I know that determining the controls layout on my Further was one of the more laborious and stressful parts of my build. I had extremely detailed ideas, and Mica, Ron, and team artfully matched up my esthetic desires with the physical realities of putting a spaceship inside a guitar. This image doesn't even include the Roland guts, but you can see the amount of creative energy that went in to making it a reality.
