Very cool, several months ago when this post was new there was a pic of a UCD that sombody chopped off the top of the rudder. He left a little of the counter balance on top. I never read any reports of how it performed, but since that time I have been on the fence about it. Right now, I'm about 90% with this build and I guess it would be the time to do it. To chop or not to chop, that is the question. I'm using a Cline regulator on this one with the tank on the CG and planned on taping it for expansion, but would also be interested in a seamless tank. Joe