The support beams of the Model S, M and O are this paralell configuration.
The ribs are fit in preparation for locating tooling points on the sound board.
The ribs are being glued to the sound board in this pnuematic press. I lowered the camera to show the curvature that the press glues the ribs at.
The board now out of the press, the ribs are being rough shaped using a hand plane. There are several basic shapes that will be "roughed" in before the final shapes are done.