Wade, according to the reps at GP there is no angle built in to the firewall. They're claim is that the plane does not require any????????? They said that there is an offset in the vertical stab to compensate for this?????????? Perhaps with a small engine the reaction is less but my experience with a 100 Saito with about 3 degrees dialed in it still pulls left. Right now it has a click or two of right trim on rudder. If built stock this thing will circle the field by itself under power. I think we should invite the rep to sit in on this one. Joe