RE: Roundtuit
I am currently in the process Disney called "Imagineering." I have the downspout, coroplast and will acquire some plywood for the firewall. I think I will insert the first 10% of the leading edge into the pipe with a gentle, descending curve. That will give more lift than a flat plate. I will cut an access hatch on the bottom for tank and radio installation. Dual rudders on each side of the rear of the fuse.
This won't be fast, but it will be fun.
Also, thanks to all of you for your help and encouragement!