Re: template for 12' Sevylor HF360 Fish Hunter floorboard
This was on another forum on iboats.com. It's the closest I found to a diagram. If you want something more accurate- I would take this diagram and as a rough draft and take some paper and trace out the floor boards fully inflated and use both the diagram and your drawings.
Or if you don't have that much paper take measurements every 4 inches to get an accurate representation of the boat size and taper lengths.