The best modification that I did this year was to install a Ballast Plus System, which is an aftermarket product to allow 40 gallons of fuel and or water per side of water ballast tanks . I filled my 40 gal. fuel tank up once at the gas station, saving 1.00 per gal. My 40 gal. of water is always cold and at the galley tap. I now have 2 fuel lockers to use for other things. fenders, shoes, cooler, recycles etc.