I find simple is easier. I use regular printer paper to draw or copy the design on. Then just case(wet) the leather. Set the pattern in position on the leather where you need it to be. Use painters tape to secure it from moving, then I use a regular pencil to follow the pattern, imprinting the design into the leather . Use a practice piece first to get the "feel for how much pressure to use to get a good impression. Then swivel knife away! Happy leather crafting!