Not sure about the whole adding some of your sample to the quick fix. Im in the same boat, i have mine coming up during the week and went and got batch 'canada - 10 - 09' and apparently it contains uric acid. It came with a vial in the box with little crystals to add it to the mixture - does yours have this?

But just from my reading and going over things, it is unlikely for them to smell it or look for synthetic characteristics only if they have reason too (you looking shifty). I'm freaking out hardcore aswell. They dont do any kind of genetic testing to tell whether its synthetic or not and if worse comes to worse you can re-piss.