I've finally decided to break down and buy a circle cutter. The more vehicles I do, the less I enjoy cutting out the wheels and tire pieces. I've noticed that you can get two different versions of the Olfa circle cutter. One that looks like it uses a regular blade, much like an Xacto and another one which is a rotary wheel. Has anyone tried both and if so, which one would be better suited to use for cutting very small diameter circles?