I decided to purchase the AveoMaxx 6 in 1 system for the exterior lighting. Supposedly, they will fit into the wingtip cutout. I finally contacted their US technical rep who gave me more information on mounting and wiring. Still not enough info for a nonelectic guy, but I think it will work out OK. If the system is as good as they say I'll have to fly this RV7A until I'm 95 to get my money's worth. But as long as I don't have to replace bulbs in my wingtips, I'll be satisfied. I guess that means I'll have to do some night flying!
