Regarding how strong to mix up the pot perm, I hope the old owner will tell you that.
Regarding the 3 controllers, I suggest going through each of those, and write down the settings. To get a manual on the controllers, they look like the Clack WS-1. http://awsaustin.com/documents/Clack WS1_manual.pdf is one source of a manual, but somebody may have more info.
In your photo, I have labeled some items. Don't forget to empty the vac. I wish I had one of those.
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