L'll Red , judging by the pictures it would appear that the floor was removed not cut . I see a lip that would support the floor around the perimiter . I wish my Flat Deck was like that.
Rick G.

why didnt i think of getting something like this.. Im replacing the hoses and pumps in my head but would like to maintain the tank if its not corroded. This is an awesome way to see if it is without removing it :D Home depot for me on the way home...

I bought it this morning. $100. Using it later today to see where the clogged drain hole is.

whole floor comes up just screwed in place and seals at the seem had mine up to inspect the tank and reseal aft all the years of use

I picked one up as well... Now I have to find time to examine the tank.. haha I have all the new pumps, y valve for the replacement. this is the last step.. Every time I say Im going to get to work, its a nice day and I take the boat out.. lol