Yea exactly, it would be good to build this, then modify your chokes to match your cell, and keep trying to improve the efficiency based on your results, you could add in a step up transformer to take that 4 amps and drop it down to 1/2 amp and then use your chokes to restrict that... even higher voltage... lots you could play with once you get the basic system going

and the variable plate gives you variable capacitance so if your tube cell capacitance is within the range of the plate cell capacitance then you could design chokes to match that particular gap, or any other you are thinking about trying.