in response to you question about sub/dilute methods. i can speak for using the substitution method. both me and my wife currently have had to take tests (mine observed). i got advice on this forum to try the Pissinator, which came with 1 synthetic sample. that's what i used and it worked great. my wife is able to get urine from one of her girlfriends and sub it for her own using the pissinator bladder. the most important thing regarding subbing (synthetic & real) is to make sure the temp is accurate. too high or too low and they will know (if they are checking). the other is if your are using a synthetic, make sure that it is mixed exactly as stated on the package.

i was afraid that if i dilluted i would get it wrong; the substitution method works the best, in my opinion.

good luck in whichever method you choose. :thumbsup: