The chart you posted says 1. I was hoping you would make the correlation and find a better understanding of why you get the waveforms you are seeing with what you are charging, whether the dielectric is water, air , or polypropylene. If you are going to continue to slap together random sized components and wonder why it does or doesn't work, then I can only offer suggestions as to why.
Have you measured the self resonant frequencies of each coil separately? Have you measured the actual weight of each choke?