AWWWWW! Adding those pix cleared things up. I've been flying for 60 years but never heard the expression "lever of the thrust line"! But now I see what you mean. I will locate the new motor position on the plans and draw a line from it to the old lever of thrust position, as you've indicated. I can then determine the angle of downthrust I would need to compensate for lowering the motor position. Thanks for taking the trouble to explain it. Looking at the pix of the original, it appears he may have done the same thing. It is hard to detect but I seem to see a little downthrust in his motor. Cheers