The bad news is that they have parts that wear out; the good news is that you can still buy replacement parts.
So...in my infinite spare time I have finally gotten around to installing the replacement parts!
Over here we have the newer unit supporting the one
being worked on. Since the new one is a different height than the other two, it has been moved to the house to serve for home-based projects. One of the accessories I have made is a table top that can be clamped into the Workmate, it's surprisingly sturdy.
New parts installed! Self imposed guilt trip eliminated! Pigs airborne!