I had been asked by the guys at Inventables to share how I mill my PCB boards. I have taken a little time and put together a step b y step guide for milling PCBs. It focuses on through hole PCB milling, but the very same steps are used for a surface mount board with vias.
I am working to get a video out shortly that will give a nice step by step run through so everyone can get a good idea how the process works from start to finish.
The project is here https://www.inventables.com/projects/how-to-mill-a-through-hole-pcb and the video will follow shortly. If anyone has any questions, please feel free to touch base and I will do my best to answer promptly.