Hi 170 sailors,I've had my 170 for five months and love it. Great boat! I've pushed her in moderate to relatively heavy winds with jib and main, to main alone, to reefed main and love her responsiveness through it all. Wondering though (in the event of a knockdown) if foam-filling my mast might offer greater piece of mind...Has anyone out there had this done? If so, who generally does this --can it be a do-it-yourself job?, where do you get the materials, etc. Any info would be appreciated.Full sails,Mike G.Alachua, FL