New build is up:
https://stash.reaper.fm/v/33037/CSI%20pre%20alpha.zip
Use the keyword Hold for a delayed action:
Hold+Solo
Hold+Shift+SomeButton
...
Just like you can use this syntax:
TrackOnSelection MapTrackAndFXToWidgets
you can now do the same for last focused FX:
TrackOnFocusedFX MapSingleFXToWidgetsForTrack
Just a heads up on a breaking change in a future version -- the new OSC template files will have an .ost extension, the Midi template files will be renamed from .rst to .mst (Midi surface template).