My take on a stretch jig

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Hi high voltage freaks!
I'm a newbee as a " esl vet" here, starting with ESL-63 refurbishment.
My questions:
Is it a good idea to use a drum tuner to adjust for the resonance frequency ?
(to example DrumDial or Tune Bot).
Do you vote for 90 hz or 120 hz as proper (uncharged) resonance frequency?
Is it a good (or stupid) idea to use a circular drum stretcher device in order to get an uniform tension in all directions (instead of just tension in the x- and Y axis) ?
 
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