Awesome, Xenakios! That works great...I created an adjacent track below the kick track that contains separate kick items (either pasted in, or split from a complete track using auto trim/split).
Then I made up an ahk shortcut to paste (with shuffle selected), set that to F9, then made up a macro that goes to the next transient in an adjacent track, and set that to F10. Then I could just walk through the track alternating F9 and F10 to paste completely randomly from the selected list, it worked perfect.
NB I did this with crossfading off so that some overlapped, then when finished made the track FIPM and auto-repositioned...cool!
Now, how about that right click 'replace selected takes in Reaper with shuffled random takes from selected in BIN'?
(J/K, when you're ready is fine by me...that is the automatic holy grail for an instant kick track replacement, so I'm just keeping it fresh in your mind!)
Here's the macro for anyone interested:
Just use Win-V instead of F9 to paste.
**Thanks yet again for a fine effort X!**