Ok, after much measurement, deliberation, re-measurement, brow-furrowing and gnashing of teeth, I think I've decided to go with the 52R instead of the 52L.
My NSM commissions are all 31" and upon further review I think that's the length for an odd jacket for me (give or take a 1/2 inch). If I do a SF suit, I think I'll opt for the 52L as I like my biz suits a little longer than the odd jacket. Let the tailoring begin.
Murl, thanks again for the photos.