yah, the burnt tops are really nothing to worry about.. i just did the same thing with my t5's... i hate looking at the burnt bits and usually cut them off, lol.. looking great though.. i'd say maybe another week or so as well atleast.. all of those pistols will recede back into the buds when she gets closer, and i'm still seeing too many pistols on her in general to say she's getting near harvest, but looking great..
oh yah, you could start to add one tablespoon of low sulphured mollases to your res now and it will help swell the nugs nicely.. being in hydro, you'll want to add the mollases to some warm water first to help disolve it before you go adding it to your res as that could clog shit up and cause more problems.. you can also use botanicare's sweet, but 'lasses is easier and cheaper.. i'm not exactly sure if it works for hydro though, fuck, should have said that first, lol.. google that shit, lol..