I'm sorry to hear you've had difficulty in reaching "Kangke," (pronounced Con-key". I have several Kit's I've purchased from them and even was able to reach them at the Toledo, trade show by phone this year. I would urge you to give them another chance, because no one Makes a better Kit than Kangke. I have the Laser 200, Waco UAF7, and the 97" Gee Bee Y. Bob