If you are running V21 on BobCAD-CAM and using Mach3 they have a full set of script templates that you can download from free on their website to make generating g-code easier (still need to go back and check the code out to make sure it works properly, But I would do that with any CAM product). Just a heads up as I know a lot of groups are bundling to two together but not all of them are adding the post processor for the Mach3 into the bundle.