Completed the step installation today. I re-rivited the aft side plates in the baggage area and drilled all the attaching holes in the floor to accept the #8 screws. Primed the area. I also installed tubing for wires under this baggage area. I will probably install a couple more to give me 3 tubes for pulling wire forward.
Speaking of wiring, I also installed wing wiring for landing/taxi, position and strobe lights in the wings. I will also pre-wire for a heated pitot that may be installed at a later date.