I also have the Sig Sokhoi ARF, and am very pleased with it. I read, and noted all of the negative posts last fall, called Sig and spoke to their tech dept. about my concerns. I was told that most of the problems stemmed from over powering the plane, and simply not being familiar with ARF construction in general. He said, if it looks like it needs tri-stocking, then do it. Glassing? Then do it. I beefed up the tail section, tri-stocked and glassed the entire front end, added a G-45 to it, and am having a ball. AS with all ARF's I think the general rule should be; If it looks suspicious, fix it. As a side note. I did poke a hole in my wing, so out of curiosity, I stripped the bottom cream section off to see if it was shear webbed. It was.