I tried to PM you back but you need to to make some space in your box.
Well, the thought of you doing dots crossed my mind as I was writing my post. Honestly, I'd wait until I had the 'dot' mtrl. in hand and measure it yourself before ordering ANY endmill.
If your spindle has any run-out at all, you'll actually be milling a larger hole than what the endmill is. Also, you'd want what is called a 'center-cutting' endmill.