No sparks at the rotating spark gap

[AndreiRS]

I was using microwave oven capacitors for my primary "MMC", but a lot of people said they are not good for this high frequency purpose. So I made 2 capacitors with pvc pipe and end caps. Both are 50mm or 2" wide and around 50cm long, or around 20". Each one gives me 215nF. So I connected them in series and now I have 107nF and double voltage rating.

Tesla Map says I need 19.2nF for ressonance with the transformer, which we don't want, 31.1nF for larger than ressonance stactic gap and 50.1nF for rotary. But then again, mine is 107. I'm not sure if a capacitor way bigger than needed would make things not work at all. When I turn it on, I can clearly hear the transformer at full power let's say. But I only got 1 spark at the gap, after 2-3 seconds waiting.