Its+a+pizza+cake.

The first thing I did was to look at some other pizza cutters on the market. When I had decided on the basic shape, I sketched my handle design in rough. Then I copied the design onto some card ( I used an old cardboard box for this). By cutting the three card shapes out and placing them together, I was able to try out the handle design for comfort. Cardboard is very versatile and can be used to make sketch models of your designs. Dyson use cardboard modelling in their vacuum cleaner, initial design stages. The piece of card on the right of this picture will actually be the centre layer of acrylic. This has a recess cut into it to accomodate the blade support.

Link to Pizza cutter design Link to "Modelling skills"