Originally Posted by
unterhausen
As with a lot of things, we have high standards for things that may not be that important. I'd rather know a frame was built by a craftsman than have one that is perfect.
I guess the "if it looks straight" poster is somewhat at odds with the height gauge that measures to the thousandth of an inch.
But I never look at the number on the gauge, I just set the height using the Vee in the center of the rear triangle indicator, pressed up against a tube that's known to be on-center. That's done visually or by feel, then the dropouts need to "look" centered on the indicator. In this case "looks straight" is probably within a half-millimeter.