This evening I drilled a bunch of 5/8" holes and installed about a half-dozen plastic snap-in bushings in various places in the fuselage -- through the spar web and through several bulkheads and support ribs. These will be used mostly for for electrical wires, but also for things like the static line, smoke-oil line, etc. "Noisy" or high-current wiring will go along the left side of the fuselage. Low-current, critical or shielded wiring will go along the right side. The smoke oil line will go up the middle, more or less.