Today I cut all of my floor (sole) panels.
I used the "ticking stick" method and it worked like a charm. I even had a little time to glass the bottom of the two small pieces that surround the bilge.
Tomorrow, I will continue glassing the bottoms and edges. I also need to cut joiners because I have several unsupported seams. I figure I will attach them to one side of each joint, and apply peanut butter to them and the edges as I add the next sheet.
There will be a support above the tank, and one where the plywood stops just before the tank fittings to stiffen that floating edge.
Here is the stick that I made to plot the points onto a piece of cardboard.
A saw mark serves as my distance mark.
Touch it to a point along the edge, pull it back 1/16" and mark along the edge of the stick, mark at the distance cut, and make one more line to show the direction the stick was pointing.
Start at the corner and work your way around. Do not let the cardboard shift, and do not flip the stick over. Consistency is the key.
You will end up with a map that looks something like this.
Next, move the cardboard to the plywood and use the stick on the marks to make sure the pattern will all fit on the sheet, and clamp it down.
Move from line to line and make a tick mark at the tip. Later, connect the ticks with a straight edge or a flexible curve.
The floor dropped right in without trimming. Here is the fit:
It got a little weird in the bow, but I plotted each feature and the panels dropped in with very little gap.