If I am going directly to my guy, he always makes me measure it out infront of him so that we both know it weighs right with no problems. I like that.

I agree, if you accept less then what is the exact amount, you are letting yourself get dicked. Sure it might not be a huge amount, but you realize you payed for the full amount, and unless the dealer is taking a few bucks off for the missing amount, you should be getting the full amount.