I am posting a picture of the rev 4 pcb. I have labeled the holes at the sensitivity pot. On the schematic which points connect to which holes on the pcb? Can anyone clear this up for me? Also just curious. At the bottom of the pcb I have circled a spot that looks like a place to add something optional, maybe for another model of detector or something. Any Idea what might would go there? Or what it is for? Thanks for any info you can give me on the connection points for the sensitivity pot.


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