Don't have one, but read the article. The upshot seems to be the Uberti, by lengthening the cylinder, removed the gas ring that prevented gasses and fouling from entering the cylinder/base pin interface. This removal allows fouling into this interface, thus quickly locking up the cylinder, preventing it's movement. The conclusion was that the Uberti is a smokeless powder gun.
I fail to see how a grease cookie can solve this particular problem. I doubt that enough grease will flow in there to allow the continued cylinder movement, and may even add to the problem by adding mass, filling space. The original Smith had/has a gas ring that solved the problem by blocking the fouling from entering that space.