Doing it the router way;
Simple jig made of scrap dropped over the box;
After zipping the router around inside the jig;
And ready for paint!!
Brood box, 8 frame swarm trap, and 5 frame nuc.. all mediums.. I dont cut handholds in the swam traps, and only do the sides of the nuc's..
Like I said above.. It takes less time to do it this way than it does to tell of it. with the jig, the router cant get out of control or out of where it needs to be. Pop the jig off, flip the box, zip the other side.. flip the box, swap jigs and do the ends. Granted, this method does not undercut like the radial or skill saw does, but I prefer it that way. Quick, safe, and it works! Not to mention Router bits are CHEAP compared to dado blades...