Building a 1178 lookalike/dual 1176 replica out of a UREI 535 EQ

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Well the 1178  did go trough a couple of rev as well. When I compare the schematics found on the JBL website at least A to J.

I have a orignial  paper copy of the rev A manual and the first difference i have found regards the "Input level F.P."

In the rev J a 10K pot is used, but the rev A has a different design using a t-600 attenuator if I understand the schematics correctly.
Here is a picture from my manual. https://imgur.com/a/6pAEesf

I know there is an old discussion attenuator vs potentiometer but the question is what you guys think is the best choice for the 1178? I lean towards using a attenuator, perhaps the ones from CAPI or Hairball.




 
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