Wow, the whole floor was gone from stem to stern? How did you know, was it spongy under foot or did you drill some test holes?
I stamped and hammered all over the deck of the one I bought, did not feel soft or sound "dead' anywhere. I'm worried now though, hope I'm not in for the same job
It looked to me like the floor was fibreglass (judging by the recesses molded in for portable gas tanks and center drainage channel). Is it glass over wood, balsa core material between glass skins, or simply wood with gelcoat over the top?