Version: v2
PCB: cluster
Currently the components of the PCB are distributed on both sides of the PCB. That may not pose a problem during DIY soldering but significantly increases price when opting for automated assembly.
Example: JLC-PCB, one sided ~$15, two sided ~$120
Main Board and Thumb-Cluster already have only one sided components.

I will try to solve this issue during feburary, since I plan to add a Trackball to the thumb cluster and have to edit/order that PCB as well.