Hi.  I am very interested in purchasing the red Kopykake Airmaster Air Brush.  I don't see the moisture trap included with purchase anywhere.  Seems like you have to buy it separately.  For those of you that have this machine did you buy the moisture trap?  Is it necessary?  Thanks.

AI did not and don't need it.

I will say that I have buyers remorse. I don't use mine very often and felt the kopyKake would serve my purpose. It does.

But, If I knew then what I know now, I would have picked one of the grex.