Mebart wrote:

well, personally i would add a TVS (transient Voltage Suppresser) and
maybe even a Zener to help protect that op-amp from an inrush of
voltage that would destroy the op-amp..
putting that aside.

Yes, I noticed that the high voltage was pretty close to the op amp
and that a leaky cap or a sudden application or removal of the power
might cause a problem.

Thanks for commenting.

Clamp diodes from the relevant points to the op-amp's supply rails would
be an advisable addition.

Graham