[bag02craso]

I have only one question regarding this: do you think it would equally work with heavy items like their sound system packs?

I doubt the weight will have anything to do with this succeeding or not. If you're playing it right with the S/N, this should not be an issue.

Don't they require you to send the broken item back to them for repair?

I have not experienced that they want the "faulty" one shipped back to them as of yet. Normally they just send a replacement and leave it be.