Is there a tool that will allow me to get the dimensions of an inside of a carcass so I can transfer these dimensions for my cut? For example, say I have made a carcass and want to fit the back exactly. I could take a long piece of wood, put one end just inside one edge, and make a pencil mark on the piece of wood where it hits the other edge. I could then transfer this to my stock and cut it accordingly.
However, a scrap piece of wood and a pencil won't give a very precise mark. I would like something that fits inside and expands out, or a stick with sliding blocks that fits exactly inside the carcass. Does Woodpecker's story stick allow this type of measurement.
(Note: I said I want to measure because I didn't now how else to describe my problem. Really, I don't want inches or millimeters, but a device to transfer the width.)