I may be having a moment but I am sure I have seen (through here) a tool that I would now be interested in purchasing... but I cant find the thread/info Its a system simaler to the Coluzzle and EK CutterBee. All I remember is there was a stencil that you placed on your card stock and then you slotted in a blade that was held in a circlular tube (about 1" circumference and 1" high) and this cut the shape. The tube had 'wheels' on it and was more stable than the knife with the Coluzzle. You could move this to the inside or outside of you shape depening on the size you needed.

Now is this avalible or have I just got the above systems confussed?