I don't agree on venting the mast on the top. I do agree on venting on the bottom. But I can sure underline the fact that the mono's are worse to right than a cat. My experience includes ; 49-er, laser 2000, laser 3000, laser 4000 and laser 5000. The laser 1 was very easy to right if you're quick enough to immediately step on the daggerboard in a capsize. I never capsized a laser 2. Besides all of these have "double vented" mast and I hate that with a passion. on the 49-er it takes ages for the water to run back out. If only they had sealed the top of the mast so that it would not fill with water to begin with.

Wouter