Yeah, I run coco DTW with B'cuzz Coco and Chunky Perlite #4 in a 1:1 ratio in 2 gal or 3 gal smartpots. I have a drip manifold system controlled by a Sentinel MDT-1. When I first transplant, I water by hand until the roots are established and once the girls require water daily, I start to automate with the Sentinel. I use low PPM's and drip until there is about 5% runoff every 3 or 4 hrs during lights on about the 2nd wk of bloom until harvest... :cool
BTW, I've been lurking in the cuts until you posted those bud shots... I had a feeling they looked better than the way you were describing their growth. I realize you say there's root rot... But before you seemed to be adjusting the nutrient mix either daily or every other day. I've said it before and I'll say it again, patience is the key with the UC. No need for frequent res changes, frequent pH adjustments, etc. I generally only adjust the pH once every 3 or 4 days if the girls look good... :thinking