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I mounted mine inside of some PVC pipe, which made it easy to hide the flash. It can be easier, however, to mount the pipes side by side. You can hold the pipes with a pipe drilling jig (V-block) in your drill press, or if you don't have a drill press, mount them carefully in a vise. Scribe a line along the length of the pipe section, and mark where your holes will be, an equal distance from the top and the bottom. I mounted mine with 8-32 machine screws, just holding the nuts inside of pipe with my finger to get the screw started, then with a small wrench to tighten. This provides an easy method of electrical connection at the outside of the housing if you attach some ring terminals at the time of assembly. You can use a credit card, or feeler gauges, whatever is the right distance for you. I made a six-gap unit, and ended up connecting it as two three-gap units in parallel. As with any static gap, the overall gap width affects the BPS of the unit, and to protect your transformer and cap you don't want the gap to be too wide Jon On 11/07/2014 05:09 PM, John Cooper wrote: > I've seen those Richard Quick and it would be nice to be able to hide > the arc, especially when showing to kids who will surely not listen > when you tell not to look at the Bright light. How do you manage to > hold the pipes while drilling and screwing? Do you set the gap with a > credit card? > _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla