Harddon do you think that he should still consider the rockwool saturation possibility? I know that saturated rockwool can choke the roots and block nute uptake. I know from reading your post that you have way more exp than me, but it seems like this could be a possibility as well. I have no exp with the oil so perhaps I am just way off. Well either way I am glad that someone else has brought more light to this sittuation.
Like Harddon said though, keep it up and just remember it is a learning exp. The things I know the best are the things I made the biggest messes out of first.
Adieu