This is what 1500 sq ft of assym spin looks like in about 25 knts of wind. Courtesy of Giu's boat this past June, with me, my Admiral (MMR on sailnet) and one other sailnet member's Admiral (Valiente's wife, Becky) sailing Guiletta.
We put the spin in the water SEVEN times that day, and once put the carbon fiber boom three feet into the water. We averaged 10.5 kts which on his 12 meter means we were on plane most of the time.
We didn't have a white knuckle moment because we had a competent and confident skipper - Alex's son Fred.