I spent a few hours poking around the forums and the game files. It appears impossible without knowing where things like technology modifier are defined. Does anyone happen to know where that is?
All modifiers come from code directly. There is no way to add new ones through modding.
I was afraid ...

I spent a few hours poking around the forums and the game files. It appears impossible without knowing where things like technology modifier are defined. Does anyone happen to know where that is?

How about a mod that adds assembler productivity through research just like drill productivity research. Could also tack on smelter productivity research to stretch resources even more.

A friend and I are playing on a modded server he has and we managed to make it about 15 hours into a game when I started desyncing constantly. We have no idea what the issue is, and restarting both of our computers/games did nothing. I will attempt to attach a log file.