It could be a combination of environment and macro lockout. Sorta hard to say but if I were you, I would raise the ph of my nute solution and top feed. It would also be wise to invest in a soil meter(good one) if you plan on running soil or soiless mix. My experience with leaf curl has always been low root zone ph and environment. I once added 1 gram of epsom salt to a gallon of water and sprayed a few branches. This cured my leaf curl for that situation.
Next year sounds fun already