After being flattened by hand, my combs sometimes stick together and are ridiculously hard to pull apart. I'm serious. This is a problem that slows me down as I produce these combs.
The available space between two of my Black combs is almost zero. The water in between finds its way into microscopic gaps. With only a potential space between the two combs, atmospheric pressure creates a vacuum between both combs on top of the adhesive and cohesive forces.
Flatness is fundamental. It's the foundation of a loud, powerful instrument.