We've all had customers like him. The HVAC guy got stuck doing the job because it was his builder that did the work. These are the ones you bid high because you know it is going to be a pain in the arse. He's some know it all that tells you all about your job and when you correct him, he rolls his eyes and tells you you're wrong and don't know what you're talking about. He was the guy that got the poop kicked out of him in high school everyday. Ignore the guy, he'll go away. I'll almost bet he's married to some overweight domineering woman that rides his arse, he has to find someplace to take it out, what better than anonymously over the net?