I am working on project which requires a 3 1/8 hole. I have a 3 1/8 inch forstner bit, but no drill press. Do have a 1/2 inch power drill that works so-so with the big hole drilling, but using a 1 1/2 forstner bit works better-just have to make more holes. Wondering if I should use a plunge router with a spiral up bit and forget the forstner bits