I have the Grex TS3 .. I love it .. If you can afford it , I highly recommend Grex airbrush and Gmac valve .. Will it improve your airbrushing .Not sure ..
They also have great support .. Over at HyperScale their is a rep that chats there a lot . Name Bryant Dunbar..
www.clubhyper.com/.../forum.htm
Also cleaning the grex airbrush , Dont use window ..
Enjoy
Rick