I water the day before harvest and then start right at lights on, next day to harvest.
Extended dark periods do nothing - myth.
I too started in the 70's. I was taught some interesting and some crazy things back then. I don't today even understand where some of the idea's came from....I tried the boiling water thing by RM3 . I'm pretty 6-1 half dozen to the other on it....It works ok but, I like to fresh trim.....So it kinda rubbed me the wrong way.....
That was my choice and I'm a bit biased to how I like to trim.....so, 50/50 on that...