Thank you for the mod! Super helpfull for a 0 strength character that does want to look nice.
Playing on 42.1.1 with no problems.

does the backpack become weightless?

MOD REQUEST: Sooo not an accessory per se but maybe a future idea to make the new ID cards and police badges that spawn with your character weightless? I want to hold on to those but with weight risking overload risking mjuscle strain, those start looking like trash to throw away immediately after spawning...

Yes and the change is not persistent, so mod can be added/removed anytime.

Does this work on existing saves?

Mod works without any problem on vanilla game and with many mods that I had time to check. If something doesn't work for you means either you didn't enable the mod or have something that conflicts with it, so unless you create an issue and provide console logs, your feedback is meaningless. I added an image showcasing mod results.

I don't have any conflicting mods and this information isn't useless considering it doesn't work. Friendship bracelet has 0.1 weight. Crucifix necklace has 0.3 weight. 🤡

If you have a conflicting mod, you can create an issue on GitHub. Otherwise, don't post useless misinformation (:

For anyone seeing this later, this mod doesn't work.