Compression Tester........

Who makes a decent one w/o spending a ton of money?? I read where you can test the accuracy of the tester by hooking it up to a regulated compressor. I was going to do that and it slipped out of my hands while grabbing it off the running board which is about 3' off the cement floor...... Now it wont zero out. A sled that "was" showing 125#s per is now showing over 150#s...... :eek:

I was using a Craftsman that I've had for many years.......

Thanks,
Phaze

Compression Tester........