Thanks Jon
I measured my 6600 card as close as I could.
I'll be using a Haas VF-3 for the main components milling and a manual mini-mill for any future modifications.
I know someone who can post-process IGES drawings for the machine code.
I was going to use a 1/4" ballnose endmill for the top profile so if I understand correctly, that tool could be used to mill an angled hole with the part flat. I'm still not clear about this.