I think you only have part of the lesson - you should never use RC clevises *of any type, no matter how tough they look*. People have been crashing airplanes from various clevis failures since they were invented. They are convenient, but they *will* break eventually in some way - pin breaks, clevis opens up, pin wears through, threads strip, threaded section opens up, on and on.
They are even marginal on trim adjustments. The picture below is the kwik-link from my rudder - which is static, and ran in a well-lubricated *plywood* horn. After about 4 years on vibration on a relatively smooth system, and absolutely no other consequential load.
Brett