I have a Duratrax Temp sensor, the $20 one. I changed the setting on it from 95E to 77E because that's what the book said for powdercoated aluminum, when I compared my temps with some other guys at the track that had much nicer guns, I was 30 degrees hotter and when I set it back to 95E then I was the same as them. I do not understand, can someone shed some light on this for me?