Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Hhchicken1-at-aol-dot-com> Hi everyone, I have a cheap handheld angle grinder and have made a Tufnol disc with brass bolt electrodes - does anyone have any idea how to mount the grinder securely enough that it won't vibrate and end up hitting the flying electrodes with the the stationary ones? Thanks for any help, Henry Hallam