Re: Puncture voltage

	My personal experience with glass plate capacitors is
that eventually "the cap blow up".  Maybe the oil will help,
but be prepared to be disappointed.  On the other hand, a 9 kV,
30 ma transformer may not overstress what you have built.  
Anyhow, if you are just starting anything is better than nothing
and you are on the road to a lot of fun.
Good luck,
Ed Phillips