On one of the earliest iterations, where it was planned as a neck through I had a long aluminium panel with a route almost the whole way under it to allow just about any possible combo of knobs and switches. I might still make one of these down the track... but my current neck through build plans are a lot wackier than this should I ever reach the point of doing the next evolution in terms of construction.

Sticking with traditional bolt on for the next one anyway as I already have a neck and fretboard blank.