The ride today was pretty rough (I'll have to add Austin County, TX to my list of counties where the roads are crap) and the bike got a lot of vibes, and I noticed the pin working loose from one of the hinges on my Airstryke aerobars. I was able to push it back in enough to get home, but it doesn't seem very tight and will probably work loose again. I tried reseating it with a punch, but noticed that it could be moved back out pretty easily now. How can I keep this pin in place?