I fabricated a small pressure bulkhead on the aft spar which mated to a slightly conical sleeve. I then used bulkhead fittings for fuel and a CPC connector for electrical. By doing it this way you can use hard line (cheaper, lighter and more reliable than hose) in the wing fairing and it eliminates the need for the lower access hatch. Mate the wing and then connect fuel and electrical on the inside of the cabin. A little RTV on the flange before wing mating seals everything tight. I was able to pressure test my IV-P to 7.5 PSI using a 10Hp air compressor. 1,100 hours later, no problems.

Brent Regan