Thomas,

First, I thought of this solution, but without a lathe to turn the wood block, my first attempt was a disaster...
It also has to be a tight fit to be accurate. Congrats, you worked it out...


Lt. Dan,

Godd idea, but how do you keep perpendicularity with your former, as you move it around to find the perfect spot ?
Also, you can only check two dimensions at a time...


Dennis,

If your turbine is missaligned with the thrust pipe you loose power. If the pipe is missaligned, you have the wrong thrust line, and the turbine won't push strait.
You might have troubles to trim the plane. It all depends of course how bad is your missalignment.


Thanks a lot for your inputs guys,

Yann