Update with this method,
I have a test cell with 2 small plates connected to my PWFM. Plates have a variable gap from touching to about 2 cm apart.
Observations thus far,
58Khz-68Khz - there is production differences but nothing that would indicate OU. Infact production is less then straigh brute force.
Note to other builders: i have found that gating the cathode has better output then gating the annode. I am yet to stick a resistor in series with the cell though. This i will try in the next section. At this point i am going to try from 68Khz-74Khz, the results i will post. Note that from now on all testing is done by gating on the negative voltage side.