Well Matt, if MBZ thought that a bolt and nuts would do the trick and not loosen up with use, they probably would have used one. I have had really good luck with the larger size POP rivets. They are really strong if put in properly and will not protrude excessively or chew up the plastic. Just my .02 cents worth...

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Jeff Lawrence
1987 300e
1989 300e
2000 Dodge Grand Caravan SE