leaves curl up at the end like that from usually too high temps.
less frequently - RH.
they look like they could use a boost of N, and I would either double check your ph, or if you are using hard water, should invest in some cal-mag. I had issues with the leaves like that until I started adding it. Other than that, looks like it's doing well. Lots of branching, tight node spacing, mostly green leaves, a little tweaking and I think you'll be really happy with the results.