You don't have to be a rocket scientist to see the dangers with this design. But hey, it's great for marketing, eh? Bob, how many hours of increased efficiency will it take to pay for the repair? Pat: Grenada hadn't had a hurricane in 50 years, either. Until Ivan in 2004. Then Emily in 2005. The law of averages is not kind. It isn't that Bob was unlucky; you were lucky. Of course, I wish everyone the best of good luck! Regards, John >Bob, you have bad luck man, I ran a boat with twin Duoprops for three years and never had a problem. **************Need a new ride? Check out the largest site for U.S. used car listings at AOL Autos. (http://autos.aol.com/used?NCID=aolcmp00300000002851)