Yellow leaves

I suggest you add bone meal. Bokashi should help you too!

The defoliation just made them hungrier as they always grow other leaves as a defense mechanism, nothing to worry about. Just increase your A and B a little bit.

Hey I went to your diary page and it shows your in week 7 veg or something. Looks like about week 2-3 of flower to me. The biggest cause of yellowing in early flower is a lack of cal mag. Usually has little to do with nitrogen at this point. Without cal mag the plants cannot process certain things and will yellow slightly. All in all I like what you got and things look good!