Sorry about your confusion......A buddy sent me the email re:Smittybilt. I just posted it in the for sale space 'cause I didn't know where else to hang it....
I have the Staun's, in a Leather bag. I can't find any details on the Smittybilt's, but Staun's have the range (3 psi) that you speak of....
I just thought, for the average wheeler, this might be a good price. I would think, without further research, that you would want to go with the Stauns. (You might want to check with Smittybilt to see if theirs goes down to 3 psi, then make your decision. Maybe save $20!)
The not kneeling is well worth it!