can you roll or fold down the top of the pot ? guessing the pot is bigger than 6L,if so then i think you could give them a bigger drink.though a lil droop is natural at lights off,they can take a bit to wake up in the mornings to
im an untidy waterer and my bottom leaves dont take long to go all manky,could cut em off if they bother you.
overwatering is easier and more harmfull early in life.a half/3/4 grown plant is a lot harder to overwater.
edit... waht i man is you can overwater a seedling once and it could take 10 days to dry out.a larger plant youd need to overwater 2,3 times in nearly as many days for same effect.
on the whole looking good