Originally Posted by
Koyote
That might have some value...Builder can see how others perceive the situation. But I suspect he/she is more likely to think, "Shoot, I build frames for a living -- I know more than a bunch of keyboard jockeys."
There's always that. However, read Admiral Hopper's quote below.
Nobody's opinion counts nearly as much as the actual measurements and specs.
The OP needs to convince the builder to consider whether he can defend his claim that the frame is within spec.