Andi Lutz and I won Tradewinds two years ago, we were (guessing on his wt.) at least 350 but it was blowing and we LOVED it! Yes we crashed but so did everyone else.

Last year the wind was quite a bit lighter, we came in second to Matt and Gina, by 1 point.

I wouldn't worry about being too light or too heavy, just sail it as fast as you can, all the time, and then go have a beer.

One capsize will take care of any real (or imagined) weight advantage anyway, so if you want to work on something, work on your boat handling skills.