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Thanks for the quick reply!  Just one thing I'm still confused about - do the two points marked P in the schematic connect at GND (or at VD if it's and MN3007)? Is there a reason why these points weren't connected to each other in the schematic, or was this just to make it more convenient to look at?

I've been looking at the Pork Barrel schematic and trying to make sense out of it, but there are a few points which I don't understand:

1) What do the circles with "pin" in them indicate?
2) What do letters L, P, and G connect to?
3) Could anybody provide some insight on how this circuit makes the chorus happen?

Thanks ahead for your replies!