Cab, I didn't even think about the wrist pin size. My current combo with a 9.56 deck heigth, 3.91 stroke, 6.4 Alum rods and .927 pin provides me the 1.21 comp heigth. You're right a pin of less than .927 would provide some additional room.
I'm just looking for a safe number to plan for my next build. At this juncture it's easy to also vary the rod length. I was planning on a 6.5 rod which may not work.