If our standard J30 spin is 700 and he is recommending 880 for SF I would also be inclined to back off.
You may not feel comfortable with non race crew.
A's do work wing on wing which confused me a lot at first. But 880 is a big sail in heavy wind and traffic. The sock only works easily if the sail is shadowed.
We use a 1000 sqft spin on an F31 and it can take some serious manpower at times to launch and retrieve in cruising mode.
