LKC has a new playlist of tutorials for the Variator script.
LKC Variator is a free REAPER script for making sound variations quickly.
ReaPack repo link: https://bit.ly/2XnYrQ9
Learn more at: https://www.lkctools.com/variator
Previously I made a video about Variator here, and I interviewed LKC about the premium Render blocks script.