Yes, buy the magnum flush. I have usd this twice successfully. I used to don the etg every week. Also, best bet is to not drink 48-50 hours before the test. I am 30, female and about 128 pds. The 72-80 hours is mostly for hardcore drinkers with liver damage. There livers can not metabolize at the rate of a healthy individual. Also, these individuals consume much more then the average Joe. So, do not let the 80 hours scare you. I always passed with 48.
E.t.g. Tests are not that accurate or reliable anyway..check this out www2.potsdam.edu