I have that Boss OS-2. It's that one where you can have both distortion AND overdrive simultaneously. It also has a tone, and drive knob.

So I am trying to dial-in the gain and OD/DIS. for the following amp types:

'77 Master Volume
Soldano SLO-100
Jump Panel

I need setting suggestions for the TONE, and for the mix of OD/Distortion.