duude carolo i am so jealous :) ...
i did a straight coir monotub as well and i ended up with a buttload of 1-2" fruits, when i was expecting a buttload of ginormous ones! i guess you could say mine is not really a monotub though. it has no holes in it, i merely open it up and fan and mist manually. i wonder, if i were to put the holes in my tub like you have done, would that correct my problem?
I have had that very same problem. Tons of tiny tiny fruits. It's happened to me quite a few times. With coir and with hpoo.
I've been having real good luck with coir lately. Mono's are set and forget. No need to open to fan or mist. You need to put a few holes for FAE. That is most likely your problem. I'd bet on it.
Cover the holes with tyvek (free at the post office) or stuff it with some pollyfill. Most use the poly but I like tyvek.
thanks all for the kind words.