I decided to try out weighing mine and my son's 3DS's and after much...MUCH...issues, decided that I couldn't pull it off with the equipment I had or that it's just too close to call. I popped the cases off both units since his is a mario one that didn't come with, and make sure both units didn't have game cartridges in them. No matter what though I kept getting wonky readings within .05 oz. sometimes saying his weighed more, sometimes saying mine weighed more, and sometimes calling them both dead even. I even weighed the box multiple times and got off reads. I don't plan to buy a high end mail scale so...my plans for going around town tomorrow with a kitchen scale are dashed, so I drowned my sorrows in a big bowl of shrimp.