Thanks for the reply's gang! I think I see how the dihederal is fighting the ailerons, and how it works. I will definetly not use the stock senior dihederal, and will probably copy the ARF versions dihederal. Thanks for the offer for some info, Sgillmore. I think I'll email Sig for the amount of dihederal on the ARF
Beautiful airplane, I think I'll use the slimline muffler on a OS70 as well. Did you make a build log by chance? Seeing or hearing what you did to fit the engine and muffler in would be helpful. Kit isn't even out of the box yet, but hopefully we'll work on it soon.
Thanks!