Zex users, get in here!

I bought a used Zex kit in order to make up for not having a supercharger anymore. I got it in the mail not too long ago, and I noticed the Zex "brain" rattles like their is something loose on the inside of it. I am talking about their nitrous management unit or whatever. Is it supposed to be like that? I want ot make sure before I leave this guy feedback on ebay.
 
dami f i had my car i would check. is it a dry or wet shot? i know my box(dry shot) is twice as big as my bro's box(wet shot). if its a wet ill check my bro's