I am in the process of preparing our server world for migration to 1.20 and thought I would share my experience with MCA Selector so far. A youtube video from Pixelriffs a few years ago pointed me in this direction.

Some things to note about MCA Selector U/I which confused me a bit when I first used the app.

• Left Mouse button selects chunks
• Middle button is used to grip and move the map
• Right button deselects the chunk

I used a 1 minute rule to select chunks for deletion. This should avoid removing anything of importance to my players. Some smoothing must done manually with such a tight time rule.

Finally, Backup, Backup and Backup again. Just in case.