Thanks to all who responded! I flushed the plants for a week, and I got a magnifier for my cell phone, cranked up the magnification, and saw a few amber trichomes. I prefer a cerebral high to couch lock, so wanted to harvest earlier rather than risk going too late. I harvested, trimmed all the fan and sugar leaves, and all are drying now. In my tent in the basement with two fans going, the temp is 75F and the humidity is 50%.
By mistake I cut one bud off with no way to hang it, so I vaped it with my Volcano. Pretty stoney already–I checked my “high” level with my DRUID app (in the App Store and Google Play) to compare it with already dried flower. If you are interested, you can read about it in Wired magazine if you Google “DRUID Wired”.
All the best to everyone.