MMC Value

Hi fellow coilers !

Im in the process of building my fourth Tesla Coil and im giving MMC caps a
shot, I've been looking at some web pages with Tesla Coils that use MMC
caps and the values are always lower than what's required , was wondering
why is this ???
My system uses a 15kv 60ma neon tranie, what value do you guys suggest for
this setup???

Thanks all !!!

Jorge Fuentes.