On my SC20 we switched to a mast top hook and aussie ring. I would recommend that kind of system. It did take a little work to get the sail to go up easily but that was because I made a couple mistakes.
BTW you will probably get a better response on the aquarius (supercat) web forum:
http://owners.aquarius-sail.com/phpBB2/If you do some searches you will find info on this topic.
-Eric
SC20 #113