I have no problem with letting the selvege hang low; the problem is that my waist and my butt are a liitle out of proportion, and I can't afford to order custom work, so the SWKs ride a little high on the hips.

Anyway, my original point was about lining up all the parts. I think having the apron itself centered is more important than centering the vertical lines on the apron, at least for contemporary casual wear, which is how Norbydog is styled in the pic.