After I ripped up the floor I did a little bit of homework on a Checkmate site. Seems like these boat were built with a scored balsa core. Started to take it out and again the prior owner did a crap job. I was with a little effort pull out a lot of the glass he laid down ....zero prep work on this one. But pulling out the core is such a pain in the butt. Planing of switching out form balsa to dyvinicell...not rot in the future at least not there