Hello I have to take a preemployment test at Quest labs within a few weeks (as soon as tomorrow) and I definitely would not pass (smoked yesterday, wasn't really sure when i'd be called in). Its for a summer job I've been at for a few years now but now I'm going back earlier. Usually I would just stop for 3 weeks and I'd be clean. Now I either want to dilute or substitute. It's a mandated drug test through the coast guard, which is what makes me question using substitution. It's a split sample because every time I've done it they split it into two vials and send it somewhere. Once I was called in for a dilution when I was completely clean, so it makes me nervous about getting called in for dilution again. So if it's a split specimen, is the substitute (Quickfix batch 4-7-1 p1nnn-13) going to be tested elsewhere that might lead to it getting discovered I have an incredibly fast metabolism and I'm pretty skinny (160 5'11) so I plan on using a GNC herbal detox kit this week but it just seems like substitution might be the best way to go right now, is there anyone who knows if the substitute will work? I'm not worried about getting it in there, no one ever watches me and the temperature thing doesn't seem like rocket science, just would like any reassurance Thanks!