I also have had problems with the GP Pitts. I was running an FPE 3.2 in mine and my firewall pulled off also and I was Pi$$ed because the engine landed on the runway and did some damage to it.. When I returned home from the field I sent an E-MAIL to GP. That was more than 2 weeks ago and as of today they have not even bothered to send me an answer. But being fair I will tell you that it flies like a bird and I have no problems with it other than it flys apart. Ken....The "BALSA BANDIT"