In the current design, the three expression outputs are 10k, 10k, and 50k. The taper can be adjusted between linear and logarithmic using the user interface built into the hardware.
Based on our research, 10k is the most universal option and works with the most third-party equipment, but there are some pedals that work better with 50k, so that's how we arrived at this decision.
In the interest of future-proofing the design, the circuit board that contains the pots and switches is attached to the main board with a snap connector, which makes it easy to swap out - no soldering required. So, if we find that there is a demand for different values (like 100k), we could potentially make other replacement boards available, and the boards could be swapped using nothing more than a screwdriver.
Feedback on this topic is, as always, welcome!