The cable could come in from the back if that switch was eliminated. Yeah, I am very much a minimalist (although I do admit that a graphic display panel would be cool) .

Come to think of it, those 4 boards could be one single board with extra layers to accomodate the inter-channel traces. This single board could be made to break away into individual pairs of channels for the various models.

I'm sure Axiom thought of all of this though and there's good reason for the present design.