Advice for a very noisy clanking PowerBlock?

I just got the PowerBlock Pro 50s I have been saving for, and I am disheartened. :-( One of them is 💯 perfect, but the other is horribly noisy when the adder weight are in. This isn't a gentle clicking as I have hear described -- it is like a SLIDE-CRASH that I can feel as well as hear. They are unusable. But it is only the one handle ... the other is smooth and quiet. Swapping the adder weights doesn't help ... it is something in the handle itself.

Has anyone encountered this problem and resolved it? Is there something I can put inside the handle so the adder weights aren't so slidey? At this point it will cost me so much just to return them that I won't have enough to buy another pair. And I was so excited to get these!! :-(