Poobs don' like spins.

Lemme tell ya - when Catherine and I spun at Clinton from that slipping turn to the left - there was little - make that NO warning. NONE.
Now, what if the CG was a bit aft?
Not fun, gang.
Bottom line - the gross weight maximun certificated is there for a reason. I'm not gonna go 'round discussing it. But, that's how the bird was certified and that's how I'm gonna fly it.
Call me a wimp, but I'm not gonna call myself smarter than the engineers.