I'm continuing to assemble the motor mount. It is "adjustable" in that I can rotate the mount with some surgery. I'm setting the angle now at 4 degrees toward the plane's center line for each engine (back of engine). I don't know if this is enough, probably not, but I'll do fast taxi tests with only one engine at a time to see what it looks like. I think I'll leave the 2 degrees of down thrust in, that is, prop (back of engine) aiming down toward the front of plane. I can change that too by shimming the engines. I think I understand the thrust angles you were all talking about and I believe we agree.

Pictures later.