I have to admit that this is the first time I ever heard of a rotory cutter in my 25 years of building...I have always avoided getting very curvey withe x-acto knive because it was so easy to screw up. I asked my wife about a rotory cutter that is used in dress making and she said it would work great for cutting Monokote. I asked her why after all this time she never told me about this neat little tool and she said...you never asked. I am going to get some cutters tonight and see what I HAVE BEEN MISSSING