All right that is exactly what I suspected.
-You may not have mixed the lime very evenly, which can lead to blotches.
-Yup, you are running low on Ca.
-Your pH is causing the worst of what you see there.

I'd suggest adding CalMag to your res and raising the pH of your res water to slightly ABOVE what your goal is, to counteract your LOW soil.

In the future, I'd plan to re-pot 6 weeks from your expected harvest date, to make sure that you are going into that crucial time with nice fresh soil that has a correct starting pH. As your lime buffer is used up, you can gradually raise the pH of the water you dump in there to counteract it. Your RUNOFF number is the very most important one, so monitor that closely.
Here's some reading on the subject- You obviously have a really good handle on stuff already, but people just don't think of how much the properties of your soil DO change over time from the action of water and roots.
http://boards.cannabis.com/grow-faqs...large-pot.html
http://boards.cannabis.com/basic-gro...ency-baby.html