/diy/ - Do It Yourself

I'm going to CNC-router an area in a desk so that a 30" cinema display stand/foot can fit snug and flush to the desk top.

Found a shop that can do it for me, but how should I measure the foot / create the vector file?

I will scan the foot. How do I set the correct distance scale or whatever? Do I need to include a 1"x1" square in the scan?

Does anyone have a beginning guide to doing this?