Martik wrote:
I do not have the correct drill attachment to do this but I do have some
1/2-3/4" metal milling bits. I was thinking of drilling the center out with
a 1/2 bit then milling the 1 3/4" hole with the milling bit.

buy a cheap holesaw. in terms of saving time and aggravation, it'll be
the best ten bucks you'll spend.