Plate Guide:

FR4: For users who want a balanced feeling between sound and flex.

Aluminium: For a stiffer and higher pitched sound profile, for those who want to be heard

POM: For the softest, flexiest typing feeling out of the three.

Notice: only Polycarbonate and Aluminum plates come with screw slots. It is up to the user whether to use them. For other plates, the switches are used to properly fix the PCB and plate to reach the ultimate flex experience.