If youre going the Dilution route, skip the aspirin step because its considered outdated tech. The final post in the Dilution "sticky" thread will tell you why.

Forget the certo as well as the 5 day cleanse because they do nothing to rid the body of THC - youre just wasting time and money.

I hear a lot about substituting, but that seems way to risky to me. You never know what the lab is going to do.
What is it about the lab that worries you into foresaking substitution?