I had been wanting a sandblaster for a while, (I need it to cut my windshield), but nothing really impressed me, the high dollar units were just that, high dollar, so I thought why not make one. After extensive research I found and bought plans off the internet, PABlaster.com. I call it "Frankenblaster", made it from an old 80 gal water heater (had to cut it about 10 inches shorter, too big) , a concoction of fittings, a dolly and other various parts. Tried it out with regular masonry sand just to get the pressures right, man this thing is great. Looks ugly, but works like a charm, can't wait to start buying other types of abrasive media. I attached samples of what I did with it. BTW, the tank only holds about 7 to 10 PSI, so before I get bombarded with any structural, strength or water heater dangers, the tank hold very little pressure.