OK....now that I have had a few hours of sleep I will chime in on something. Warning.....coming from me to this forum it would be "hear-say" to yall about what I'm about to share, but for me I witnessed it with myself. I once knew someone (who was a CLOSE friend I partayed with OFTEN) who was rather skinny and a regular daily user. I have seen numberous times this person would smoke right up to the day before a test, do a major dilution and pass a dip stick test for a job. When I first met this person, I thought she was yanking my chains....but after several years and job opportunities I've seen this person pass test after test using this method. Now on a personal level, I have used the dilution method after taking a few hits a week and still passed after being 4 days clean. I'm a rather small person myself (5'3", 125 lbs and high metabolism) if that helps.