I am really confused. Probably a good thing I don't build frames!
I purchased the Park frame alignment tool. With the small number of bikes I am thinking it might be of some value. Now I don't know!
Using the gauge, it indicates that the triangle is actually skewed toward the NDS by about 2 mm or less.
I used this tool for the dishing exercise. I have checked it multiple times on multiple wheels.
I made user the blocks on the end were touching the same radial spot on both sides of the rim. The rim runs true in the truing stand with very small, <.5 mm, lateral variation.
Found two places to take the frame. One in Richmond and the other in Baltimore. Richmond is closer so I may take it there when I decide to take it apart.
Just thought of another measurement to take. Check the brake bridge! May have to use the DT and ST for the reference.
I did check the main tubes for straightness and they did not show any deviation from being straight, both top/bottom and the sides.
The only other open question is how to measure the stays? Of course the axle center is one end. What is the other?