Peter, thanks for the post. I was getting ready to bond in the sleeves for the wing and stab tubes but after reading your post went out and started measuring again. The real trick is to figure out where the center line of the fuse is. I finally decided it should be half way between the wings and through the center of the vertical. When I did this I found the seam at the spinner was way off center as you said.
I would be happy to pay more money if the tubes were factory installed in a jig which seems like it would be easy once you had the jig. Then again maybe they don't think they can provide the accuracy we want. All I know is I've spent a lot of man hours measuring and I still don't have the tubes in.

Regards, Jim O