2-1/2" is not particularly high, we ran the race boat with 4" with no trouble at all, and Pascoe rigs the SR9's with 5, although it is a little different with a single of course.
I'm sure the Bravo 1's would help with your ventilation trouble, they really do get a good grip. My 30's would be useless tho' I think.
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"I Agree with everything you say really!" - John Cooke to Jon Fuller - 26-01-2013
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