He probably just thought you were being obnoxious with your response for their company to use the factory mounts. I see your point but if I got that same return emaill from you about changing my product to fit your needs, without knowing you were a part of this forum I would have sent a much nicer return email but stating that something along the lines of "we feel our product is fine the way it is, or make something up about how it can't use the stock mounts" I dunno just my .02. But yea screw Grill Tech they shouldn't be responding to people in that type of way I'll give you that no matter what you say to them.