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This is a method I use to help make my prototypes quickly and neatly. The example product is a double zippered key purse which unfortunately had a design change halfway through. The first 3 pictures show the key purse when finished. This one is the side that holds the most bulky key bunch. This is the other side This one shows what it all looks like when closed up. The following picture shows the patterns I've drawn for this model and they are the patterns for first cutting the pieces. They are 2mm all around over the size they will be cut down to in later steps. This picture shows how before cutting out I give the thin cardboard a spray with some contact adhesive and left to dry for 1/2 hour or more. Brushing on is alright as well but do it light and quick so as to not change the cardboard shape. The patterns now hold down well for cutting out if placed onto a poly cutting surface. The poly cutting boards for kitchens work well as well. Here I show the 1st cut patterns neatly cut and no movement. Next I use the same procedure for the second cut patterns shown below All the patterns cut out and shown below Next a sharp knife is used to cut out the leather pieces. Note that the glue holds down well still but not enough to damage the leather when removed. Shows cardboard being removed. All the leather parts needed are now cut out. The crocodile parts will come later. I think that is the limit of pictures I can load in one go so more a bit later.