Superscope EC3 mod to line level

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Ok, here is another attempt to add the gain I think I would need to match the current setup.
As this is fixed gain, where is the best place to put a trimpot? I could give a little more gain to the first stage and put a pot in between the two stages, or, since the trimpot will be hidden, should I put it in the feedback loop of the second stage?
op amp-1.png
 
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