Your fretting hand's thumb should land down the center of the neck during play, would it be a bad idea to just contour the treble side of the rear neck profile? Sure, "soften" the edge of the bass side, but in general, relatively square. I know it sounds like a real "green" question, but I'm kinda serious. Barring any comfort issues or weight issues, would it make the neck any more stable? Has anyone done this? I mean aside from looking a bit unorthodox, why not? Just jabbering a little bit is all. Thoughts? I understand if you guys think this is a foolish question... edit: I remember in a recent bassplayer mag, seeing a bass called a "worp" that had something similar to this.