Who uses the 3" indexing head on the Desktop? By 3", do they mean that's the clearance from center to base, or total diameter of the workpiece that can be carved? Does the 3D software include a library of projects one can choose from to get started? I'm specifically looking for chess pieces, maybe move on to nativity scene pieces and religious icons (Buddha) and animal figurines after that. I'm excited about Shopbot having that option as an add on, since Rockler has only been giving it lip service.