[1.103] Water Mill output not changeable

Hey devs !
When reading the 1.103 changelog, I saw that the manned water mill output was reduced to 1 eu/t. This made me pretty sad, so I changed the value in config to 200 (was 100) to get back the good old 2 eu/t.
After starting up the game, my mills give me 2 eu/t for a few seconds, then drop to 1. I don' know why this is happening. Maybe you intentionally can't increase it ?
Thanks in advance.

Humpf. The reason I was using manned water mills is that they are 8x more efficient than solars. Is it possible to add a setting for the manned mode ?
Thank you for answering anyway.