Thank you very much for your answers, Ron & tmt32mj!

I have done reglassing on the hull of my SW55. I put one layer of a kind of heavy fiber cloth with epoxy.

Ron, do you think I need more reglassing on the hull? Because you said that the hull of SW 55 is too thin, causing vivration and noise. How thinck should it be to be more rigid and to reduce the noise?

Tmt 32 mj, where can I get the mufflers that you said? What is Mike Tyson and Cooper? It sounds like a name of a boxer!

I know my stupid question sounds funny, but I am living in a rural area of the inland Canada. I am a countryman!

And is "VooDoo Props" "vooddoprops.com"? I see some propellers and boats on that site, but not a muffler that you mentioned.

Once again, thank you very much for your help, guys!

from a Canadian Countryguy