I have added a second stage EF91 as a reversal of the original sawtooth, basically using the circuit that would normally drive an electrostatic CRO symmetrically. But with a change of cap values I have reduced the output of the waveform to approx a 50 Volt peak, it may also provide a little bit less loading on the first stage.#
Next step is to add the EL84 driver for the transformer and keep my fingers crossed it will work.
Adrian