me either, as it would actually work against you, not with you. maybe an air compressor that had a fitting that would fit.. but other than that.. maybe pressing with a finger, instead of trying to use air.
fwiw, you wouldnt' depress the center of a tire guage..that pin in the middle of the gauges is to depress the valve stem to allow the air pressure to go into the guage.
dd, wouldtn' that from answers.com be for air cfm, not psi?