As for patterns, I always design my own. I purchased a few at the beginning to get carving, but Now I use only my own designs because I want no copywrite issues when I sell them. A lot of Autocad, Photoshop, Designer 3d goes into them with many hours, but I get the exact Design I'm looking for. This is no easy step and there is no breezing through. But you can do it too with practice.