Those are amazing! I love them. I made a few for a library program for school-aged kids, and those were hard enough for me. Yours are very intricate.
Did you use scissors, an exacto, or the traditional chisel?
I used an exacto knife...I saw the chisel after the fact, but I am not sure if it would make things more difficult, or facilitate the process. I think perhaps on the smaller details it might make things easier but am not sure...I am kind of in need to figure out a better way of doing this when I make them on tissue paper...since tissue paper is much more fragile than copy paper.