Been meaning to check out one of the links on your sig which says VERTICAL COOL TUBE. Which I just have
Looks like you are doing everything right so I am not sure but here's a couple of things I noticed.
1/ Looks like you have something munching your clones or plants later on. I think it could be thrips I am not sure, perhaps you have already dealt with that (I just skimmed your thread) Reason I say that is I thought I could see white lines in your leaves, small squiggly ones, which is basically where the thrip has eaten from the underside of your leaves (the chlorophylls) It doesn't kill the plant generally, it just means there is not as much material to photosynthesis and as such make energy for the plants to grow. I have been fighting the same problem for a while. I ended up getting a not very friendly spray from Bayer. You can also use Diatomacious Earth, which are ancient diatomes and dangerous to the insects exoskeleton. check it out on google. a fellow RIU'er (Hayduke) put me onto that. These little fuckers are almost impossible to see, and they generally lurk under the leaves. When they get bigger they can really move as well!!!
2/ I would possibly try and raise the plants a bit now they are vertical, not sure it was kinda hard to tell with the angle of the photo. Just make sure the whole plant is exposed, top to bottom, and get them babies as close as you can. On the cool tube you will notice the lower part near the fitting is really cold, just let the plant get right up in there bru.
your pics looks great, and nice videos as well. I think whodat put it right, a lot of strains can be low yielders, most of the og kush is very limited in yield imo for example. I sturggle to get 2OZ of giant plants that would normally produce 2 or 3x that.....
peace, DST