my friend recently got 20 amps of sust. They are legit because he says got them from a really good source. The problem is that some of the amps are coming to 1/2 to 3/4 of an amp. He flicked the tip with his finger to make sure that he draws all of it with his needle. Are all amps of sust supposed to be one millilter or can some be less but just more potent or concertrated.