I don't particularly care what you choose to believe. I'm stating from experience on what is done and why it's done on the STB track and has been done for years on the STB track (I've seen it since I started with STBs in the 70's and had vets do this procedure for the exact reasons I stated. Vet's from New Bolton Center in PA. Race track vets who work right out of the Univ. of PA. You choose to believe that I only posted on here to spread disinformation, ie lie, and argue, that's your choice. You choose to learn something you were not previously aware of, your choice as well.