Mission Accomplished! grin I got my chords and they sound fantastic in my EZK2 midi track. The fix for me was just extremely careful observation of the steps as I did them and keeping track of the right files. SMP and MuseScore and EZK2 all settled down and behaved themselves once I showed them who was boss.

Now I move on to the next stage. I am mixing in live bass and drums which have played over the original utube video. Unfortunately, neither the video or the bass performance appears to have played to a click. So I am having synch issues with my new Midi EZKeys track. I will have to make some manual adjustments - Either in the midi track or in the Bass Audio track? Any recommendations? Don't say "make a tempo map" in Reaper, cause I have no idea how to do that, dispite my study of the tutorials.

BIAB – 2025, Reaper (current), i7-12700F Processor, 32GB DDR4-3200MHz RAM, 1TB WD Black NVMe SSD, 2TB WDC Blue SSD, 1TB WD Blue, 2 TB SK NVMe, 6 TB External, Motu Audio Express 6x6