Quote Originally Posted by greendove
Where is this thread? Could you link it? Chances are, they more than likely had issues because of either temperature, or some other mistake.



That's a fail. The test describes that as a "ghost line", which is pretty much a place in the paper for the chemicals to settle if there is no THC in your system. If you're nervous about substitution, you might want to consider experimenting with dilution, and seeing if that gets you your required results and a passed test.
It's right here:
http://boards.cannabis.com/showthread.php?t=86233

I'm gonna get some tests tomorrow and try diluting. The doc's on vacation so that buys me some more time to clean out. I have a pretty fast metabolism so hopefully that'll work in my favor.