Thanks Ben. Those are excellent suggestions. I just happen to already own 2 of the laser incidence meters to which you allude. Where I've had difficulty, tho, is in using the meters on wings with ailerons installed, or horizontal stab with elevator installed. Unless the control surface is absolutely zeroed (guesswork at best) the angle of incidence will be affected. How do you deal with that, or do you always measure the incidence before you've mounted the control surfaces. .. Ken