heya DanK...
I was looking at that pic of the droopiest plant... notice how the petioles are REALLY pink? And the leaves look kind of uneven or vaguely splotchy... that's a nute problem. The leaf stems being pink could be sulfur def, and the veins would be phosphorous def, or you could just have a lockout situation from unbalanced pH in your dirt.
You know the deal... flush and feed!

BTW your other plants look sweet. Very nice!