How to tell MIDI editor a plug-in track is drum?

[Stromkraft]

Tremor works for you because you use it's audio routing. Ritchie is probably using an external drum machine without multiple outs. You could achieve something similar as the above with a drumrack. Load a drumsynth or an external instrument to for instance C1. In the chain editor set the note from C1 to All (on top of the drop down menu). Then add an empty chain to every note you have a drumsound sitting.

No, it works because I assigned each pad of the drum rack to the corresponding note in the drum machine. I also use external drum machines, like Rytm or Tempest. The only difference is where audio goes out and in, but MIDI and audio may be kept differently in a drum rack. Just because you send MIDI in one chain doesn't mean audio has to come back to the same chain. It can go to any different one.