Sorry, I don't know how to post a sketch but I just closed the needle valve (high speed) and was able to get a full tank into it. This is how I have it plumbed: carb line runs into tank left front and clunk almost touches back of tank, exhaust vent enters tank beside carb line and brass tubing is bent up to almost touch top of tank and fill line goes thru cowling right into the very top front of tank ( which makes it impossible to use to de-fuel). I think I'm gonna get a Sullivan tank and be done with it!!

Scotty