For sure,
@DevilDog_0651 , the best place to view the trichomes will be on the calyx (bud) just as you said and not on the sugar leaves.
Three methods are used to judge a harvest: Time in flower, browning of pistils and color of trichomes. I feel that list is in order from the least reliable to the most reliable being trich coloration is the most accurate evaluation. I have seen a plant with nearly totally brown pistils but her trichs were just half clear and half milky. Had I pulled her based on the pistil coloration, I would have pulled her early for my preferences. I really think pistil coloration is strain dependent, and with that said, trichome evaluation seems to be my best bet. I always say that these are my personal preferences while yours will surely vary.
Glad you like the chart. I keep that handy as a reference and it serves me well. Be sure to save it to help some of the new growers along when you show them what to look for in a harvest. Great job my friend...its coming together for you nicely!!