The Upper and Lower pot boards
Click image for a close-up:
Both pot boards are physically identical except for the pins used on the IDC connector.
There's not much to say about these boards...
Experience dictates I always use sockets for 4051 ICs. The Alpha pots specified on the BoM have little locating lugs on the front of the body that prevent them mounting to the panel, but these are easily removed by gripping them with pliers then bending them away from the shaft.
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