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The main things I'd be concerned about with a 10" electrostatic CRT is what its maximum anode voltage was, whether that voltage was enough to produce a bright raster on a 10" screen, and perhaps whether a 10" electrostatic tube with a post-deflection anode might be available (obviously a better choice for high-brightness displays from an engineering standpoint).
The old Tektronix scopes used an interesting circuit with an approx. 5" CRT where the cathode was at about -1250V and the Second Anode ran at about +8.5kV ... beam current being supplied from an approx. 10kV RF-type HV supply. The HV circuit, IIRC, consisted of a 12AU7 (Osc), 6AV5 (Pwr Amp) and five subminiature 5642 (Multiplier) tubes producing about 10kV from 100kHz RF.
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