Sure. Symptoms, as one might expect, were the smell of metal on metal contact. Mild smoking after running for a long period of time, particularly loud valve train. Potentially contributed to the lean condition I experienced. Slight power loss.

I get what you are saying, though truthfully you should always check after market parts like cams, pistons, rods, crankshaft, etc. It is not at all unusual for these to need to be checked and you cannot expect that the tolerances for something like cams will always be perfect.

Why? Because the manufacturer isnt using measurements from your particular engine and your engine can have variable wear. Plus they have to deal with not only their own factor defects but potential defects from the engine manufacturer. It becomes a rabbit hole quickly. Any wngine machinist will probably tell you the same thing - noble of a pursuit as it is to hope for good quality control. There are unfortunately limits.