A "Cumpiano"-Style Guitar Workboard

From a forum, here is a picture of the guitar workboard described in Guitarmaking.

The forum poster writes:

You don't need a mould to build a guitar. The traditional Spanish method, used by most of the great classical and flamenco builders of the 20th century, is to assemble the instrument freeform on a flat workboard, or "patron."

[...]

The cork and paper "shim" on the top of the patron is designed to allow for the slight arch cut into the bracing of most classical soundboards.

It's a proven method, well suited to small shops with few power tools.

Here's Cumpiano himself, building a koa steel string.