I had the first flight today on my motified f-22 with the retractcs, I had no problem taling off. the opening will cause a bit of drag but that is eaisly over come with more speed it took about 100 feet to take off, it flys gret with the os 55ax in couple of weeks Ill get one of the guys with a radar gun to speed check it, I will also post some completed potos next week, need to get those photos taken I actually changed the main gear door openog since the last photos, I used air cylinders to open and clost the main doors the spring system didnt work too well in the first flight they kept closing ill see how the new system works out,