Hi Bob,
Well it's easy to be out spoken on a forum where you never really get to meet the person and understand there feelings etc.
Anyway great ideas Bob. I will follow up with your advice on the flaps before I do any cutting etc. I got everything running again. As I was setting the tank height while running it in the garage I noticed that the upright and the inverted RPM's were the same but as the plane went vertical the RPM's dropped, but only in the vertical position. As I kept messing with it, the plane would be 10 degrees off of vertical and would be fine but as soon as it hit vertical the rpms dropped. I tried different RPM's and it always dropped. WEIRD.... Here's what I found. The tank I'm using is a plastic, clunk, Great Planes tank and the rear of the tank is designed so it's concaved, yes, it go's in approx. 1/8 to 3/16 of an inch. So when you look at the clunk it looks like it has plenty of clearance but when it goes vertical the end of the clunk was getting blocked off enough to slow down the RPM's by the concaved end of the tank. I cut an 1/8 inch off the clunk line and now it runs smooth in all positions.