The LC circuit works Perfectly well, I think there's no need to add a resister to it. Perhaps a tuning coil would be better, that could make better since?
If the Capacitor is in series., When the points Fly open Back EMF HV would rather be absoarbed by the Capacitor than jump across the points at around 300 volts, "Burning them." Maybe those are 120 volt caps? and he has 2 of them in series to make an 240 volt cap? I'm not sure what he's done but everytime i put 2 ac caps in series HV would jump, defeating the whole entire purpose of the cap. The purpose is to catch the emf into amps and return it, see oscillation, then a oscillating discharge on to and along with the secondary, which he has no secondary because he is only catching the emf.
Please be aware of the working of the system, how the coil holds a series capacitor discharge that the condenser usually absoarbs, resonates and releases across the plug, all due to the way its wrapped. Also notice that the coil wired this way restricts amps due to how the magnetic field is built up.
I shouldn't have to point this out, this is easy to understand if you can just look at it and see how it works. An our or 2 of just researching "How it works," a good tutorial on the internet and you could master this quickly.
you have 2 coils, points, condenser and battery. Not much to this circuit. It already works the way it is, a perfect example circuit. This is by far the biggest LC resonate circuit i have ever seen in my life and yet its not given the proper credit.
yikes, i'm going to try an build my new coil.