Ding, how can you claim that "Based on the 07 and 08 Alter Cup results, the F16 number needs to be addressed"? Were there also F16's racing against F18's at either venue? Were the race courses and wind exactly the same at both venues? By what measurement are you using to compare the two? Feel? <img src="http://www.catsailor.com/forums/images/graemlins/blush.gif" alt="" /> You would have to run say 5 Blades against 5 Caps. swap boats after each race, do that about 10 times in all kinds of wind, and then look at the results to have any idea how the two compare, oh, and keep times on each race as well. Until that day comes, we will keep our rating.