Me too on every point.I agree with you that while possible, playing off the five as John suggests is risky, like all other options.
I do think that looking back at the original close up view posted, one can't make the seven and draw the CB without it coming out away from the bottom rail. Do you disagree? And do you not think from this close you couldn't more often than not jaw the seven and send it up table while definitely drawing the CB back along the bottom rail.
Maybe I'm all wet, but it sure looks to me that pocketing the seven requires an off center hit?