I am currently getting a job ready in a locker room. I am applying 3/4" maple plywood to an existing painted plywood surface. The issue, I need to cut 25 round-4.75" holes for air vents that will have aluminum vents over them into approx. 1 1/4" total depth material. I have 1/2" error margin on the holes with the vent flanges. Anyone have suggestions. I was thinking a hole saw.