What a brilliant setup. I wish I had had something like this 50 years ago. What a time and effort saver. Today I put this device to good use. Have used it to check and fill a total of 12 car tires and 3 spares, 4 boat trailer tires and 1 spare, 4 truck trailer tires and 1 spare, 6 motorcycle tires, 2 jet ski trailer tires and 1 spare. A total of 34 FULL SIZE CAR TIRES TESTED AND INFLATED IN LESS THAN 20 MINUTES. FROM START TO FINISH. It took my wife a long time to remove and reinstall the valve