FYI.....Jims suggestion of the 2604 and 2141 triple blocks work well. found them both on ebay for $55 and $80 dollars respectively. we race with it on a contention 30, end boom, and it has comfortably kept good control up to 45kts.
we have found that 10mm main sheet is kind on the hands, but with the 6:1 purchase does not run as freely as i would like in light winds....here is a compromise.....i am tempted by 8mm replacement sheet but it will need full fingered gloves if you are going to play it aggressively.
hope this helps