Nothing can give you peice of mind like not smoking at all but I have passed several tests.

Im the same height and weight. Im skinny, with a normal amount of body fat, say 10%.. I have passed 3 tests smoking kind bud for over a month everyday, heavily. On the first I passed in 28 days, straight up. The second was 18 days, straight up. The third was 12 days, and I ws scared as fuck, but I passed straight up. The only thing I did differently on the 3rd was drink 1 liter of water and a 12oz pepsi. All tests I had been previously smoking for 30 days straight.

Hope this helps.