U Can Do 3D
nosram, I use a DuBro fuel dot on mine and am very pleased. Only 5 bucks and it includes brass tubing and a second clunk for your tank. Unlike the metal fuel dots out there the Dubro caps have a small handle so it is easy to pull the tubing out. Anyone with a tight-fitting metal one knows what I am talking about. The third line refueling system is about as close to fail safe as you can get.
ng7m, I have a large Sig tailwheel unit on my Midwest Extra and I am pleased with its quality. You might want to check it out as it is an actual leaf spring setup and is relatively light weight. I used the stock tailwheel setup on my UCD and am happy with its simplicity and minimum weight.