I've reworked the code a little to make world storage take up a little less space in the world file, so if you wish to migrate your stored positions to the new version, enable "Use Legacy Loading" and enter the world (You can disable the feature when you leave).
If any issues arise, then enable both legacy features and let me know so they can be fixed.
Hope you enjoy!

report*

Cool! I'll test any bugs if I see any.

The feature should now be added, but please let me know if there are any bugs so that i can fix them asap (I haven't tested this in actual multiplayer lol)

Alright. Customization is lacking on a ton of mods, so thats good to have.

They have to be active at the time, but now that you mention it i might work on making what you've said possible (as a config of course)

So if i've discovered something while my friend wasn't playing, like IDK, the pits of hell? Will he receive that on his map or does he have to be active and in the world for that to work?

Honestly better then map sharing