Hmmm. Is that like prop wash and flight line for us less educated?
It's easier to do than explain.
Some call it a tick stick. You touch the tip of the stick to various points and trace it's outline, or just one edge and markers, or notches onto a smaller plywood sole(of scrap).
That merely gives you the ability to then lay the (undersized) board on your full piece and transfer those exact points onto your stock.
This was a template I fit to my cockpit before building a new one. The extra time it took and the wasted plywood were well worth it in saved time.
Do it anyway that the idea works for you, Justin, but add another step: Transfer those points onto some cheap plywood. Make yourself a template with that. Then you can trial fit it on your sole, in pieces or one piece. You can make corrections denoting a change in the outline on the template, trim it down in the boat, or even add a scrap to fill out an area. Get the idea?
The extra step is the old adage, "measure twice, cut once" so you don't spoil that expensive piece of teak and holly sole.
Your new sole will fit like a glove.