Hello, I have never used STL for my CNC machine. But you can easily click on the part you want to create as then select save as STL. It's really that simple. I think i even created a video in the blog on how to do it. It only takes seconds if you need to go down that route.
Hello Mark, thanks for replying. The problem I am having with selecting the body and saving it as STL is that it saves the whole body all together. Do you still have the files saved from when you cut those pieces on your cnc? In the video you said that you used your cnc to cut those pieces but I couldn't find the sketches in the guide and any file for the lower sill in the downloads section