cabrego... i have the same unit ... i turned it into a gravity fed unit and it works top notch now... i used a 5 gal bucket with a 1/2" fitting added to the bottom, I rotated the part of the blast gun that the media is fed to 180deg. My compressor is rated at 130psi max an it works just fine now. I also reworked the drain at the bottom, i pluged the existing hole, cut a new one so it dumps out straight down, and added a 3/4", 1/4 turn PVC valve and a short piece of 3/4" tubing that dumps into a second bucket thru a strainer to catch the big chunks. a light was added too. add the mods coast me about $5 (the PVC stuff).
If you want pics of what i did mail me
gjalfaro@ellijay.com
jim