Been pottering with components again, just using copper clad, just the EF91 as a Miller-Transitron, or what ever it is called, saw tooth generator. At present the sweep would be around 2.8mS and the flyback 0.22mS. The next stage is to try and drive the EL84 and drive the transformer, that for another day as fast running out of time for today.
Have to search my junk bits for a suitable variable Pot. Fingers crossed.
Adrian