I've had my new 550 for only a week or so (thanks Brian! ), and was wondering if I had it assembled wrong after watching and listening to the infamous CLUNK. Found this post and saw that I was not the only one that was concerned about this issue. I emailed Dillon to find out what the delivered price would be for a couple of new powder bar springs, and they are already in the mail, no questions asked and no charge. I am already impressed with the no BS attitude from the boys (and girls) in BLUE!!!