Have you tried Hexen, aka N-ethyl-Hexedrone ? Do you know how it compares with 10-20mg 4-CEC at the same dosage? I've heard there's 4-CEC/3-CEC or maybe even 3/4-MMC that's sold as being NEH atm, and there's no real way to differentiate them.
The problem with that is that the chloro-caths are very probably neurotoxins, when Hexen isn't..