I appreciate the advice! I'm already thinking about running a 6" PVC main line with 4" branches for the equipment, though I get plenty of power at the far end. I may have lightly overspecced the collector... it's a fairly burly 2HP unit for my little system.
So, back to building! I'm working on a 7 string Voyager with a 26.5" scale.
The neck has been cut out and routed to shape, truss rod and carbon fiber channels were routed, tuner holes have been drilled, and I made a snazzy little rosewood heel laminate for a dash of extra flavor.