If you're up for a really, really boring read, I'm a very firm believer in the aspirin method. I just passed a test after smoking quite regularly for months on end, with my last toke being a mere 40 hours from my test.
http://forum.grassci...tested-how.htmlUnfortunately, the amount of water you drink on a regular basis is of no consequence. Our human brain seems to think of water as cleansing, and that drinking more of it will "wash" the problem metabolites away. The reality is that these metabolites are stored in your fat cells, which are constantly being burned and regenerated by your body. The metabolites will only leave your body as you burn the fat in which it is stored, which basically means that they will always be in your urine. Diluting is only effective hours prior to the actual moment of testing.
I truly wouldn't be terribly concerned if I were you, but if you do decide to take this risk be sure that you plan for the contingencies. Pick a method of passing your DT and know it backwards and forwards. Arm yourself with the knowledge of how your body processes work, and how to use your body's own functions to your advantage in this situation. Most importantly, if a failed DT will lead to any potentially catastrophic consequences, I would urge you to avoid the temptation to consume.