Now I understand that there are a few obstacles that require navigating over with this dilution method - such as the color of the urine, the creatinine levels, specific gravity, and ph. Although I'm fairly convinced that the color/creatinine levels are realistically manageable (I plan to run practice trials before the test), I'm less sure about how to accurately mold the specific gravity and ph of the sample within the 'normal ranges', and could use some guidance.
When dealing with dilution techniques, the only two aspects you need to be concerned with is creatinine and specific gravity.
pH is NOT checked to determine dilution. pH is only checked to determine adulteration.
Color is the least aspect in determining an overly diluted sample. Even samples with a nice color to them can still have unsatisfactory SG and creatinine levels.

Tips on maintaining acceptable creatinine and SG levels are all found on the Dilution 'sticky' thread. The thread will also inform you on when to stop smoking prior to utilizing dilution.