Ok guys, I have searched this and found a few suggestions but we're doing several upgrades to our RV-7 and we're going to have to run additional wiring through the aft fuselage. This is going to involve drilling additional holes in the bulkheads (yes, I've checked with Van's), installing snap bushings and then running the wires. I've recruited the mandatory extra skinny guy and we're going to do it within the next two or three days. I bought pipe insulation tubes to put over the bulkheads but now, I'm trying to decide the best thing to use as a platform. 1/2" plywood sure seems heavy and cumbersome and could potentially do damage. Anybody got any better ideas?