The boom is there.

Nice video...although, I'm not a fan of slow motion in sailing videos - the angle is good and it really shows the kind of crazy wind you guys were in.

Dude...those are just knarly conditions and you pretty much count on a capsize or two in that kind of wind. Those clouds looked pretty tough and the rain is going to obscure any chance of seeing pressure changes and shifts on the water. Just look at the righting you guys made with the sails down....the boat still almost went back over the other way. That was just simply a lot of wind and aggressive Biscayne Bay chop. It's really tough to take sails down on the water - it's pretty messy and tough on the sails and the sailors (getting them reeled in through the water and wind)...but it works in a pinch. I would only do that as a last ditch effort - which looks like what you were doing there.

You might consider keeping a drift sock on a 20 foot leash on the boat that you can clip to the forestay and toss off the bow when the boat is capsized. This will drag the bows into the wind and hopefully keep them there when you right the boat to prevent it from spinning and flipping immediately.

One note about your boat setup - boards should be up about halfway when sailing downwind under all conditions. In those conditions, raise them up so only about 10 to 12" of the board are in the water under the hull. That might have given the boat less incentive to round up when you stuffed but it's still no guarantee. re; mainsheet length, your main was already mostly against the shrouds so you weren't going to ease it much more without risking damage to the battens. It does look like the traveler could go out a little more but I don't think it would have made much difference. It was just very windy!

Last - no sunglasses or goggles!? Probably should have been wearing a diving mask and snorkel at the rate water was coming over the deck (it's been done before).