Ah, good catch, I'm glad you pointed that out before replying. I've forgotten to screenshot BB's river range as well and included just his preflop range.
Here it is, the most important one for the conceptual questions here I'd guess is the brick river - unfortunatelly FlopZilla cannot handle "50% of A high" or "A high with bdoor fdraw" like crEV can so it's not 100% exact exact, but it will work:
River bricks off, we can take that we're 80 20 favorite for simplicity -
River is a middling card, we're 67 33 -
River is a middling spade (usually great for our range, but not for this particular hand), it's around 60 40 -
Toying around with various cards did lead from a total brick like 2h being the best for SB, through middling cards taking it to 70 30, to some spades which end up with 60 40 for the SB. It also still seems our 80 20 range (for the Pinpoint optimal size concept) is quite small as I figured earlier.
I've excluded Q7o but left Q7s in, and excluded sets and some of his gutshots from his preflop range. That mimics how he will in most cases raise all those earlier and they won't be there in his river range (although I kept a small amount in).
River range is what we're interested in the most here.
It does alter the effect some runouts have as 9T might be still in there, but it's okay for now. It's not like we'll know exactly which gutters he does raise anyway.