K Sonn - The condition you describe could be caused by other things than just engine angle thrust. Specifically, I am thinking about the incidence angles of the wing and stab - have they been "Robarted"? Are they both zero-zero degrees? I have asked fellow modeler "Dr. Gravity" to respond to your inquiry as well, as I am by no means the highest authority on this subject. I just know that over the last 22 years, I have always been taught, and have always found to be true, a little extra down thrust (or right thrust) won't hurt. I hope "Dr. Grav" will contribute here, as well as our many other knowledgeable modeling friends. Joe V [email protected]