Filter caps for fusor supplies

[guest]

I've been grabbing parts for a fusor supply consisting of a 90kVP x-ray XFMR, a variac, a pair of diode stacks,(and now) a pair of 0.03uF, 50kv capacitors. At 45kV, 60Hz, and 10ma output this gets me about 3% p-p ripple. I'll be using bleeders and most likeley an interlosk switch to help protect myself, but I'm still concerned about the stored energy in the supply (~60J). Series resistors will keep this capacitance from vaporizing my inner grid in case of an arc, but will not save me from a one-way trip to the promised land if I slip up.
The million dollar question is, for those of you out there who have working fusors, how much ripple is there on your high voltage input? I'd like to shave down my filter capacitance to a less lethal value if possible.