How many days have you been flowering now? I have the best results when I harvest the main cola and the secondary ones, then leave all the bottom buds on for 2-3 more weeks, really ups the overall yield when those smaller lower buds double density due to all the light. I have found that if I leave NL until the whole bud looks darker and all the hairs have been orange/red for a couple weeks and hardy any new hairs are growing and its giving you that yummy cotton candy smell is the right time to harvest for me personally. When magnified the trichs look about 30% amber and the rest are milky. Now my NL is a different Pheno than yours, but I have found there can be a pretty long harvest window and still get good results.