Regretfully Rick passed away this last summer. I have taken over the project. The wing tanks were made from irrigation tubing squeezed somehow into a D shape and are mounted behind the front spar. I wish I could have seen them before they were built in. At this time I still haven't found where they are vented, but am working on the fuselage getting it ready for paint and haven't spent much time with the wings. I have talked to the man who welded them up for Rick but it was several years ago and he doesn't have much information. As near as I can tell, they were made from 8 in Al pipe and each is four feet long. Today we were looking inside with a friends new toy (sorry, tool) which has a light and camera on the end of a long flex tube about 3/16 in in dia. Made by Snap On tools. I couldn't determine much but did see that the tank has a baffle. What type of stuff do you rub on your elbows and shoulders at night so that you can face another day of sanding?
Dan