As a developer with expertise elsewhere, such write ups always amaze me. I used to think of hardware as unmodifiable black boxes, but over time my point of view changed to consider almost all consumer electronics hackable to various degrees, you just have to know how.

On this note, I wish someone hacked the Shimano Di2 firmware to enable the RD shift amount of gears different to the stock value (10,11,12 and so on). Judging by this video [1], the hardware is capable of that (or was, the RD-6770 was superseded a while ago).

[1] https://www.youtube.com/watch?v=hAW5DvLSkak