Hi Free Bird,
Glad to see you are going to do a build thread on the Banshee. The Banshee is next after I finish my Mach 1.
I'll be building mine from plans and the build article I purchased from Flying Models. The nose is quite short between the firewall and wing and does pose problems. Attached is picture I thought might interest you of a Spring Air firewall mount nose unit and a Hayes 12oz Slimline tank laying on the plans. As you can see the wheel is not the problem. The problem lies in that the fuel tank protrudes into the wing and sits a little high in regards to a side mounted engine.
I would have no reservation whatsoever cutting into the wing to allow space for the tank. I've done it before with no problems at all. I am considering canting the engine up a little to get the carb more inline with the center of the tank.
Then again, doing a tail dragger would solve all kinds of issues. But I'm hard headed and a mine will be a tricycle. It's all in fun and the pain you know!
I look forward to your build.
Clay