New build is up:
https://stash.reaper.fm/v/33037/CSI%20pre%20alpha.zip
Added primitive support for X Touch One, which likely means primitive support for Faderport, AlphaTrack, etc. is probably somewhat there too.
Use the MCU.rst file
Use the XTouchOne.axt file.
Select a track using the mouse.
Now use the Bank and Channel to navigate, or select a track in Reaper using the mouse.
Known minor bugs -- ii falls off the end to the right, probably something to do with the last track not currently selecting properly.
Check it out and see if it works !