Ouch.
Had a chance to use the Sata 4000. I don't see it as an upgrade to my gun but it is a good way to milk a fist full of cash out of a painter.
I have also use this several time. I actually quit using this gun because I loved it so much and was getting very close to buying something I didn't need.
http://www.anestiwata.com/products/supernova.cfm