High compression blues.

I get your math.....
And that would bring the pressure to at least 190/197 with the cam in at 104*,as calculated by the Wallace.
And if the Wallace is correct,

at 12.80Scr it predicts .065pop-up,compared to your .048
at 12.45Scr it predicts .056 pop-up
at 12.10Scr it predicts .045

so you may be on to something; that's Killer work, right there