What ChinookPilot had to say is perfect and I didn't learn it at first. A lot of the arfs don't tell you to put the CA hinges on like that. It makes it so simple and I have never had a problem. I try to tell everyone I can about it. I have the spacewalker with an OS .91. I haven't flown it yet, but after reading all the post I can't wait. My only concern was the landing gear. I was concerned that a hard landing might cause the wheels to bang into the wings. Sounds like no one has had a problem with that.