I remember once seeing a device that looked a little like a joy stick that was being used for working with 3D objects. It looked fun, for a little bit then it just looked confusing. Paper and pencil FTW!
Also, random question, are you going to be selling any extra prints online? I really want to get your Natsume Yunjincho print but I wasn't sure if you would be selling them online (or if you even had anymore).