My air compressor is 150 psi, and I looked today after you said something about running it around 90 psi. the output was set for between 80-90 psi. I wouldn't think that running this unit at 12 amps would be too high on a 110v. I paid $420 for this unit off ebay...that's not that cheap to me. About how much more is it gonna cost me to ship it back to you? Can you provide a link for the manual? the one I keep seeing is from 2008.