I just may have to invest in an anhedral stab set for my Beryll. I also fly and Xtreme Composites Astral XX with the 4 degree anhedral stab. This plane is very easy to roll. Then again, it flys faster on an OS 140 RX. After not flying this plane for a while, I took it out yesterday and I forgot how easy this plane really rolls. Now I am having second thoughts about trying to sell it<g>