EZ Test for Cathinones yes or no?

[GaumarolBostich]

Hey fellow users, I do use EZ-Test for a first examination on 4- or 3- MMC. I know that this test can't distinguish the types of MCs and certainly has problems ruling out the CMCs but at least it will show completely different substances.

Question: Lately I had some irritating results by positively indicating 4-MMC which didn't match the effects. (Clearly yellow but couchlocking and a horrible aftermath.) What are your experiences?