We started so many conversations. Just to finish one, Tom - Kershaw Knives
http://www.kershawknives.com/products.php?brand=kershaw has THE finest customer service I have ever experienced on any product, any time, any place. Truly old time service. You have a choice on getting your lock mechanism replaced. You can send the knife in and they will do the work AND restore the edge to factory spec, or you can give them the model number and they will send you the parts - everything except a new blade.
I see a nice National Cycle light bar (take off from Dave's bike) in someone's future. Great group of folks! Sure enjoyed the day.
Thanks for hosting, SideCar!