I used to be more hot headed, but realized it never got me anywhere. If I have to be I will be, but I like to try to be civil at first. Let me tell you though. I am ticked that I spent my money on a part that is junk. I hope they make rebuild kits for them.. If they do then I will just ask him to refund enough to buy that.
I try to stay cool but that really would have pushed my button - I'm with Mitch, I'd have called him out - if it's an honest mistake it can be smoothed later in the thread--