I set my Giant PX-C2 with two layers of gorilla tape and added the stan's sealant. I had to use an air compressor with an air gun to set the bead. I've had no luck using my electric tire inflator. Can anybody give me some insight on how you got the air pressure where you wanted it? Do I need a floor pump with a gauge? I don't trust the compressor to get me to the right PSI.