2-3/4" Holes in Plywood
I have to cut a number of 2-3/4" holes in 3/4" plywood. The options I'm considering are a Forstner bit, a hole saw, or an adjustable hole cutter, as in the picture below. The reviews on all of these products are all over the place. The Forstner bits look like they will dull quickly in plywood. Hole saws are slow to cut, but they're pretty durable. I've never used a hole cutter. For the record, I don't know how to sharpen bits, so I'd like to know which bit will last the longest. The hole cutter has a lot of appeal because it is infinitely adjustable. Which way should I go?
Scotty: I can't change the law of physics! I've got to have 30 minutes!