It just needs a expander not enouch cv control for me. I see stuff on the back.

EDITED Saturday May 30, 14:35

There are two more unused ADC channels on the breakout connector at the bottom and i2c connector with interrupt near the power connector. Working on an expansion module now :) Suggestions are very appreciated!

The current prototype expansion module just adds potentiometers for Level and TCB, and CV control over scroll and zoom, but that was more of a proof of concept. Thinking about designs now that the launch is done. A lot of options are possible, but there is also always the question of what is actually useful as an expander and what should be left for other modules to do.