[mothered]

so basically exactly how this tutorial is written then correct?

Correct, but use a weight substitute that's realistic (not rocks etc), such as a roll of packaging/shipping tape. Drop off points and carrier drivers have this on hand, hence It gives the Impression that anyone working In that capacity stole and replaced the Item with the tape.

I didn't take the headphones Into account In my previous post, so the combined weight of your Items Is 100 grams (round figures).