There seems to be something wrong with this. The explanations in the manual and indeed the reasoning behind it is quite simple, but I canīt get satisfactory results. I made a little test project to ask about this :
Three tracks, each one with this FX chain :
Iīve got another plug available and retained in the FX bay :
In the project bay, if I choose to replace in project all instances of ReaControlMidi with ReaFir, for example, I get this :
Track 1 :
Fine! It worked on this track
Track 2 :
It doesnīt seem to have made something on this one
Track 3 :
It changed ReaEQ instead (!). Am I losing something?
You can try it on the attached test project of the discussion thread :
As usual, Tod kindly confirmed it on v4.7.