OK, Patrick, here are the pics of what I call the w mod. This plane would climb like the jet and bank like a mono. I don't know if anyone else tried it, but I did 2 of them. This is the first. Also, just having winglets will get you great results. I think the optimal lenght I came to was 1.25" out from the airframe. The silk ribbon was to help the trim in wind. If you want pics of a winglet plane let me know and I'll see if I still have them. Tim