Original poster: "Daniel McCauley by way of Terry Fritz <twftesla-at-qwest-dot-net>" <dhmccauley-at-spacecatlighting-dot-com> I've read in some websites i've come across that a rotary spark gap is very bad for a coil run with an NST? Is this true??? If it is bad for a NST, what precautions or other measures must i make to make it work okay. Thanks