Hi AGR413. Thanks for your input.

Yesterday I replaced the heavy bronze prop nut with the aluminum one I prefer, plus I removed about 16 square inches of 4MM coroplast I had glued under the hor stab tips for reinforcement. I took it up and did a little trimming and it flew fairly OK. The wind was terrible, though, so I could not decide if the CG was good. At some points in turns it acted like a wingtip stall or a tail heavy condition, but because of the wind gusts from all directions, I could not decide on any changes. It is more limber in flair, as expected. I did make some high speed snap rolls over a safe area and everything held together. Repeated it about 6 times. In knife edge the rudder seemed to have a little more authority but not too much which pointed to the CG possibly being OK. The carbon rods and string seem to be holding up. I'm waiting for a calmer day to confirm the CG.