I have both guns, and am trying to adapt the EW gun to use with the adjustable caswels power supply, if that helps. Casawells gun is built better, my EW started to fall apart right away, with glue loosening. But that was nothing a little CA couldn't fix. They both have their pro's and cons. Caswels has the nice air bypas screw at the bottom of the barrel, that I like, but EW's gun cleans up a bit faster. ONe thing I did to my Caswel gun was to snip off the threads for the difuser tip. now I cna just slide the tip on and off for faster cleaning. The EW gun also isn;t plauged as much with the clumping that the caswels gune does, due to a smaller powder discharge bore. Caswells power supply is exxcellent though, EW's trigger broke before I had a pound of powder through it, had to hard wire it. Alot less waist to when covering large items, crank the voltage up and spray