Making mirrors parallel in a vacuum using charge

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BernieM
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Two identical front surface mirrors are hung in a vacuum chamber with a high vacuum with a bit of bias of their mass wanting to lean into each other so they don't separate on their own. The metal surface is connected to a variable high voltage source. Both mirrors are connected to the same source. When voltage is applied will the two mirrors be pushed apart and remain relatively parallel to each other (reasonably close enough that casimir force can be observed?) And what possible 'fine adjustment' of their distance might reasonably be expected? (Would their separation distance be fine enough that one could separate them by say 1nm/volt, for example, or would it be difficult to make fine adjustments on the nm scales.)
 
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That seems a rather elaborate setup, of first setting up a contracting force (the angle of the mirrors), then creating a way to overcome that force (through charge), only to then try to measure an entirely different force.

But presuming your setup now, I think one major difficulty will be, how do you separate the forces related to your setup, from the Casimir force? In the end you will need to be able to say "I can entirely account for all remaining forces, this remaining force must be the Casimir force". However, given how the separation of the mirrors will already be a function of the voltage applied, and not necessarily an easy function, it will be hard to have any confidence.
 
Thanks for the responses. Actually my concern isn't to measure the casimir force but to use the apparatus in creation of a particular wavelength of photons. The problem with casimir devices is the parallelity of the mirrors for it to work properly. Thanks Tom for the link to the electroscope, I had totally overlooked it.
 
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