well put here in general,...
NL420 the take home message is : a) do your homework on coco, a lot of pro's and con's involved with it; b) it cannot be treated like true soil, what works with soil usually doesn't with coco because it, as mentioned, is intended to be used as a hydroponic medium and not a "variation" on soil; coco is
soilless just like peat based Promix and Sunshine#4.... c) be prepared to sweat pH and EC constantly (just like any hydro method), going in AND out, and if you're going to do stand alone hand water pots, there is a shit-ton of labor involved in direct proportion to the size of the plants... It's true, you can potentially grow monsters in small volume pots, but you'll be worked like petting zoo pony to do it...
Bottom feed systems seen to walk a fine line, despite seemingly being contrary to the whole "must-flush/high % run-off" advise you have with stand alone top feed pots.... No doubt it can be made to work, but if there's a problem, you're forced to yank it off the system and doctor it out of trouble....
Different cultivars will have different needs, tolerances, etc., and you gamble some growing different cultivars connected to such systems. One nute "size" doesn't fit all, that is to say the EC levels may be fine for some and problematic for others.... finishing times, timing of feed type switching are factors here to consider... Don't run a known fast girl with known long cycle one or you'll get jammed up one way or another....