This is how I do it. Graphite pencil in nut slots. I always just turn keys so strings have 2 to 3 turns around post for E, A and D strings. I never lock string around post. My guitars have always stayed in tune . A nice neat job..
Not that far off how I do it Norm. I don't lock the strings either..... except on the strat that came with locking tuners. Fifty years, never had a problem. Although, I always forget the graphite pencil deal.