BigHE where are you located? Maybe somebody is close that can help.
X2 what Kracker said. Remove the liner in one piece, flip it over then replace your plywood in the floor. The plywood that gives the floor its strength is laminated to the bottom of the liner. No cutting on the liner at all.
I have an 18 Fisherman that is junk because the PO cut the liner all the way across and removed the back half to do a transom replacement. Then they did a halfass patch job on the liner by just running fiberglass and tape over the seam. I could have removed the liner in one piece with just one winch but when i lifted on it, their patch job broke. I am about to pull the liner on my 83 V20. I plan to set up pipe scaffold on each side of the boat with 4x6s running across the top to lift from.
Here is a lift rack set up from another thread-
http://www.wellcraftv20.com/communit...53&postcount=7