I'm confused as to the routing methods. I'd like some drum keys to be routed to Part FX, some to Performance FX. Drum Part FX are on/off (no send level control is possible) whereas the Performance FX from Drum Parts have a Send Level control - I think. How do I set these up? I am also confused as to the purpose of Part Output: Drum. Where does that go? I was unable to find a description of these on YouTube or in an understandable way in the manuals. Can anyone explain?