snap-on said 90 PSI max on the side so that is where the 90 came from. I guessed at the 75 for what the compressor was currently set at. Reality is I had no clue what it was at. I say 75 because that's what I had it set for the plasma which was the last time I remember setting it. That was months ago now and the thing is buried & semi hard to get to so I never adjust it....

Whenever I get back to messing with rivets (need to take the bed off - so no clue when I'll get to it) I'll see what the PSI is & bump it up.