I did my xls encores with a series of hole saws , got a set at harbor for 15 dollars. I'm by no means a great woodworker but I know my way around a saw.
First I marked the depth on the holesaw with tape. Then drilled a 4 inch to the depth then 3 1/2 then I drilled a 3 all the way through. Cut away the material between the 4 and 3.5 with a knife. Checked and adjusted depth with calipers. Had to open the 3 inch hole a bit with a rasp.
The harbor freight hole saws were a tiny bit undersized which worked out.


