A thought just came to mind. The reactance of the coils MUST be lower than or equal to the WFC at any given frequency for this to work. Again, referring to:
http://www.ionizationx.com/index.php/topic,2426.msg22802.html#msg22802If the reactance of the coils at any time are higher than the WFC you won't be able to get a charge on it. At least that's the way I understand it.
Of course, equal reactance on both coils and WFC means resonance...
So, L1 in series with the secondary on the secondary core needs to be at resonance with the WFC to restrict current flow on that side of the WFC, but L2 needs to be set up BELOW resonance in order create a charge on the WFC. (Thinking out loud)