Originally Posted by ChiefOsceola
Good point on the rain Drifter. Only problem is I thought I was gonna have a coronary looking for a 1" bit. The step bits were $40+!!! Finally found a 1" hole saw for $10. Afraid to even think what a 3" will cost.
Do you have access to a jigsaw? If so you can buy a metal cutting blade for just a couple of bucks. Or, drill a 3" circle of smaller holes side by side and clean out the burrs with a file. Just a few suggestions.