RE: Sig 4*40 vs 4*60
I have the Red one as well in the 60 size with an OS91surpass on it. It is very stable in windy conditions and is a blast to fly. To make mine more visible and to distinguish the top fromt the bottom, I used the windex method and put 3 wid yellow stripes on the bottom of the wing. This really helped me determine the attitude of the plane while flying.