First off, I frickin feel you on that bong-load, Im staring down my ph(x) right now. I wouldn't have the gumption to be making these posts if I could use that sucker, Ha , just doing this to pass time till I can hit that mutha again. However, 420 posted on one of my threads, the one about faint lines coincidentally, that he tested his fresh quick fix and got a faint line. This gives hope, the darkness of the line could be totally non-dependent on the amount of Thc. Perhaps it relies on other factors, i.e. how much ink was used in making it, or maybe other chemicals in your pee make it dark or not and the reaction that causes it to show up is the only thing important. My guess is that the faintness is of little importance, but that is a guess. However I do doubt that any test controller would send a sample to a gc and waste company money if it tested negative, no matter the faintness. Im sure there are guidelines on what to do if that magical little line shows up, and they probably wouldnt stray from them based on the darkness of the line. If your testing negative and you still have time, I'd say your in pretty good shape.