I watch them as well. They provide some good good insightsVery hard to distinguish correlation vs causation. My personal opinion is that the mains are also problematic in these engines and the engines that have their bearings replaced are showing main bearing issues because they are not dying earlier, as they would have normally, due to the rod bearings. The German H2 Motors guys on YouTube have torn down several S85 and seen bad looking main bearings on engines without aftermarket rod bearings.