I've found his results identical to my own when it came to his weedeater line test, I tried half of the ones he tested and found identical results. Discovered twisted power max weedeater line.
Another one was his box cutter blade tests, I had already tried most of what he tested, identical results. Found the Irwin carbide coated blades were the best for my application, continued using them.
One of my all time favorites was his bar and chain oil tests. Had tried most of the same ones. I found motor oil seemed to be the best, he found motor oil to be the best, i continued using motor oil.