What is the little mat with the ifixit logo on it that came with the kit? I thought it was a mini magnetic mat, but I tried to get a screw to stick to it and it didn't. It's very flexible and looks like it should be peelable, but I didn't want to attempt this on the off chance it is something else.

As far as the guide itself, it was very easy to follow and worked perfectly for me. Thank you!