khodges - I've seen that shape tank, mainly in Europe. I don't know of any brand.

I can't see hooking up fuel lines to be that big of a pain. It's just part of doing business. Think of the guys who use flying wires on some of the WWI stuff. It can take an hour to assemble the plane at the field. And then there's cleaning it after! Yikes!

The only problems I see with the wing tanks are fuel draw and making sure the tanks are empty before disconnecting anything so fuel doesn't dump all over the inside before you can get the loose lines plugged. If draw isn't a problem then if wing tanks are the best solution then go for it.