I like Edd. He comes across as a decent man. He uses his nutty automotive creations for charity work, etc.
He's got some kind of high qualification/s in engineering, I think. He seems to do things on cars the 'right way'/has all the kit. etc. I expect, as Ali said, he just tightened the nuts quickly but not fully with the windy gun. Then finished with a TW (that wasn't filmed). He doesn't strike me as being remotely cowboyish - on the contrary, his manner of doing things correctly can make him look a bit **** to some of us more lazy slackers.