rderoc
Go to http://owners.aquarius-sail.com/phpBB2/ and ask your question there. It's the factory owners forum for Supercat/ARC catamarans. Any thing you need to know, or any thing you need in the way of parts is available thru the factory.
Don't be surprised if Bill Roberts (the designer of your boat) comes on and answers your questions personally. Can't get any better than that.

Regards,
Bob
Supercat 17