Allow me to add a few thoughts here:
1) Don't make moving assemblies exposed to dirt, so tight that a grain of sand causes a failure. Think AK-47, not M-16
2) Don't let your answer go in search of a problem. Obviously, there is some limit to looseness and wear, but if the system is working, don't cause a maintenance induced failure. Trust us. We've seen all manner of "improvements" and mis-assembly cause problems, usually because the owner simply doesn't take time to understand how these things work.
3) KISS - keep it simple stupid. These things are built to relatively loose tolerances so that various vendor's parts will play nicely together. Clean and grease it once or twice a year, specifically the locking pin, and go fly.
4) There is no way to clean, inspect, re-profile (if necessary), and grease the locking pin than to disassemble it periodically... regardless of who made the tailwheel.
5) The control arm is a wear item that WILL need to be replaced occasionally, regardless of manufacturer. When it doesn't lock properly, inspect the locking pin and related notch in the control arm. If the control arm shows wear on the square edges of the notch, replace it. They're dirt cheap!
6) Go fly.