Thinking of using a UL Power engine or SDS type fuel injection which require a return fuel line to the tanks. So I added return line fittings and internal tubing. Also, I was concerned that the small cut outs for fuel to flow between the baffles (wing tank) at low levels was not sufficient with the higher fuel flows of a FI system so I cut through and notched the baffles and filled the hole in the skin. Also cut in a V channel in the back of the wing tanks as per the plans for Aluminum tanks. Pre fab'ed the fiberglass angle with 1 bid and some uni strands laid on an aluminum angle, second layer of bid when installed. This provide a path for wires and Pitot tubing to the fuselage