The Stutter Edit manual has not been updated in years. The instructions for SONAR work but describe a method more appropriate for X2 and older. The method described in msgs #3 & 4 work for X3 and newer. The process is the same for
any effect plug-in that reads MIDI data. In summary, the steps are:
1) add the plug-in to the FX rack of the track/bus to be affected
2) Use the VST2/3 drop down above the plug-in UI to "Enable MIDI Input"
3) Add a MIDI track with input set to the controller, output set to the plug-in, enable input echo