Thanks Doug. That's a good idea to put the switches along the top, but I think I can still make it work.
I made a side-view template showing the depth of each avionics box and crawled into the fuselage with the canopy installed and lowered. Looks like the audio panel needs to be at least 1.5" from the top of the panel. That will avoid interference with the tip-up reinforcement and provide enough room for the wires in the back.
Dave