Ah, glad you found it! I had some issues with that in one of my earlier mods - something was nagging me but I couldn't remember. I ended up using bob's library as it had a good set of abstractions for working with recipes.
I just tested with 1.2.4 and it's working great - thanks!
I think the power settings are good (I started a new game after you adjusted the K2 settings). I don't have medium poles automated yet and just had to split my steam generators into two networks - so I'd say it's tuned correctly, for my playstyle at least. I'll be looking at nuclear power about the time that I need to split the medium pole network, most likely. I'll let you know as I progress though.
I like what you've done here btw. I played with another electric capacity mod a few years ago and am pretty happy with your mod so far. Fuses are a great idea.