I’m sure there is a better way to describe my situation. I need to cut a square opening about 3”x3” into a piece of pine. This piece is backed against a PT post. So no chance to use a jig saw. I made the first one by starting with a series of drill bits around the perimeter, then used a chisel. It worked but wasn’t fast.
I’ve seen ads for “roto” tools or something like that to cut drywall. Is there a different tool, or some other technique, that I should consider?
In case you’re interested, this is to install door stops for stable doors. Definitely a honey-do item.