EZ Test for MCPP: mcpp and mdma reaction comparison

[easy e]

Hi all,
I had something that was still on my to-do list, remembering it was a question somewhere here on the board. Someone asked if I could post a pic of the reactions of mcpp and mdma with eztest for mcpp because they thought it reacted to everything with the same color. Here it is, mcpp (yellow color change) is on the left, mdma (orange color change) on the right.

 

[severely etarded]

^ just curious, not to step on your toes or bash your kits, but what good would this do for a sample of mixed MDMA/piperazine, becoming alarmingly common according to EcstasyData.org? as you can see it's showing up in samples from powder to capsules and pressed pills.

Would not a simple marquis test be just as effective in screening? Regardless, wouldn't both kits be just as useless to detect mixtures? I think these mixtures are a growing concern..

It would be nice to have a reagent that reacts ONLY to mCPP/TFMPP/BZP etc, and not at all to MDMA. Then a marquis could confirm MDxx, and the other would test negative for any piperazine