Has any one had the problem with the 510 carts get loose ? I have had this problem and found if you use a pare of pliers and squeeze the cart right above the air wholes just a little bit to distort it it will tighten up in of to use for a little while so more can be ordered . Just a little tip . I keep a leather-man in my pocket so I can do it at any time while I am out .
Mike
Mike