Preparing the backs.

Using the drum sander to thickness the backs to 2 mm.

Mass production??

Hardly what you would call mass produced using very small hand and finger planes to shape the fans braces

New use for fiberglass kite sticks

Using more, smaller fiberglass kite sticks helps make the clamping pressure more uniform along the fan brace.

Rubber ends caps protect the delicate fan braces during clamping/gluing