I want to purchase a tube for next season. How does it attach to the boat? Will a 3 seat tube be too much drag for my boat? I'll be using a 14x11 prop on a 60hp Bigfoot 4 stroke attached to a 20' Sun Tracker Regency. I have a 14x9 prop as well. Will this be better to use? Is a 2 seater a more reasonable choice?