I picked up the large HF blast cabinet. I followed all the suggestions on here regarding sealing it, etc. My problem is it shoots a lot of air, but the media is surging or not coming out very well. I have 60-70 feet of black iron, 5 moisture drops, inline filters, and my air is dry. My air comes from a 5 hp Ingersoll with 80 gallon tank. I think my problem is the siphon pickup. I believe it may be picking up too much. Any suggestions. This thing is driving me crazy. Ive tried all different pressures and nozzles.