I get my mainsheet block-to-block in moderate+ winds (of course you have to easy some when it gets silly windy!)
Interesting. I haven't seen anyone else getting block to block on a stealth. Heck, Nigel got a tail as described by Timbo on his boat, and doesn't seem to cause him any problem. Wayne has the same GP sail as you have, and doesn't get block to block either.
How much rake do you have on your mast?
