Looking good! Im interesting to see the final product and weight!
Your leaf deficiency appears to be from a phosphorous and nitrogen deficiency. What are you adjusting your pH to?
You want pH 5.8 for hydroponic and soiless (peat moss and coco coir) and pH 6.5 for soil.
Here is a nutrient availability chart
Here is a cannabis leaf deficiency chart
here is the Cannabis Plant and Pest Problem Solver and the Plant Abuse Chart