For those curious, the OL summery/thin/shirt blazer arrived today. A 48, it fits pretty much TTS for my 39" P2P, dwindling shoulders, skinny-fat frame. It's nicely short, too, an effect that would be much more pronounced on taller folks (I'm 5'9).
Also, a longshot, but if anyone wants to trade size 33 or 34 Creep slim explorer chinos for a 32, please PM stat. With a 15.75" waist at top, they're a full size smaller than their tweed pants.