You look like you put in your time as far as research, and it shows. That is some excellent looking bud there. It is a bit hard for me to see yellowing. You said over-water, so it is soil? With only one plant experiencing an issue, Alistair is likely right on. Generally.... the same strain is going to take the same amount of nutes.. please correct if I'm wrong on this...
But a good flush for a day or two most certainly can't hurt.
But they do look fantastic... I'd say your dead on track.
As far as curing, I'm sorry I'm no help there friend. You might start a new thread specifying that topic.
On a side note:
was hoping for more input...
Your topic is everything...
I honestly expected to see pictures of some setup and plants and basic "show-off-man-ship"... :hubba::hubba: :hubba: (I am so high, but I copyright that word)
If you were concerned and wanted opinions, the sick plant forum and a title such as "Yellowing a bit.. nuteburn?", might attract the right people, who may also have, the right answer.
:48:
Keep smoking buddy, I know I will.
Good Luck