Ok, track with me. You call up Sadowsky or Mike Lull. You ask him to make you the ultimate '51 replica bass. He asks, would you like body contours with that, no one will will be able to tell the difference from the audience? You say...
Emphasis added. To me, that is the crux of the argument. A "'51 replica" is a slab. Period. A similar looking bass, a "50ish" bass, is a different thing. I agree with you more than not. I wanted a "50ish", "teleish" looking bass, and built a totally modern "vintage-ish" looking parts bass to fit my personal style/taste. I actually love it for how incongruous (wrong) it is... It ain't no replica, though: