Sorry for the delay...
Christmas tree lights reflected on the newbie:
And light - 7lbs, 4oz. The neck is very comfortable. Naturally, a bit heftier than the SJ. I'd say it's stable. After the journey from Saskatoon, the setup was perfect, and all four strings were just a tad flat but otherwise in tune with each other.

You can see in the headstock shot how the fretboard is slightly darker than the neck wood - sweet. I played it a bit with the nickel strings, but had to restring with steels to get the clarity and impact I like up top. The sonic signature is similar to my (chambered) ash/maple SJ/P-5 which is nicely clear, bright, and punchy all over the board. This SP4, in comparison, is a bit more subdued and sweeter up top and packs even more punch. I've been playing along with some tunes with the Super P > Walkabout > JBL E140 in a Showman tone ring cab. It jumps into the mix with both feet. Nice.

I'm totally diggin' the new headstock.

Cool P, Sheldon!