I had just finished putting the last turret into a Marshall plexi model 1987 turret board and compared it to the layout.
NOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO
It was a plexiglass circuit board so I just tossed it and started over. Had it been epoxy board I would have pulled the turrets out, but plexiglass is too brittle for that.
Eventually I got it done. 11 years ago, still sounds great! Although I recently modded the presence. The original design allowed B+ into the pot resulting in intermittent muffled static and pops. This blocks it.
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