Is this using a multi-gap spark gap, or rotary? I was under the impression that I could hope for at max 2' w/ a SRSG. Anyway, I'll give it a try the next time I run it. In making the video for my class, I ran the coil too long and shorted out 3 of the 81 capacitors in the MMC, so I have to do a little bit of repair before I run it again.