Summary

I used 6mm aluminum pipes. IN CURA I THEN SCALED TO 35.0 in CURA ON ALL PARTS. You may need to modify the top part thats adjustable for whatever spark gap distance you choose to make. I manually bent the aluminum pipes.

here is a vid from a test without the pipes. https://plus.google.com/101752879485770468493/posts/M9zND6r7mt6
So you can see how i did the base with a 12V fan. Here i also scaled the base at 35.0 in CURA slicer