Use pot or not?

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Got few headamp pcbs and all of them use big alps pot. I dont want to buy pot for every single one so Im between bridging connections for pot on pcb or solder pins and use 1 alps pot for every board just by reconnecting pot to that pins. In case of bridging pot connections I would control volume on source, is that legit way of doing it or is it better to just get pot and connect it to board i want?

I still dont plan to put boards in case so changing pot isnt problem.
 
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