On Thursday, November 5, 2015 at 10:18:31 PM UTC-5, Oren wrote:
On Thu, 05 Nov 2015 18:56:41 -0600, wrote:

Should I just use a hole saw, which
will pretty much ruin the saw, or is there another method or tool?

Golly gee. How 'bout using a hole saw bit to cut a circle with a
drill? You must be from Canada, eh?

Is there a "saw" that cuts circles, please let me know.

I've cut circles on my table saw many, many times.