I'm working on a small project (41"x17" changing pad tray for nursery) that will call for my first-ever use of a router and need some pointers so I don't mess it up. The sides of this tray will be made with maple 1x4s and I need to cut out a 3/8" rabbet on the bottom to insert a plywood bottom. The plan is to assemble the sides to form a rectangle and route the rabbet on the inside of this assembled piece with a 2.5HP router (either with a fixed base or a plunge base. One tip that I had heard was to not remove more than 1/8" of wood at a time or else the cut might get choppy or burned, especially in hardwood. That seems to suggest that I either adjust the width to 1/8" (with bearings or some other means) and cut at full depth (1/2" to match the plywood), OR cut at full 3/8" width and use the plunge base to start with a shallow depth and work my way up (if rabbet bits even play nice with that strategy). I believe for both options I would be using the router at max speed since it's a sub-1" cut, correct? After the rabbet is cut I was going to glue in the plywood and hold it in place with a few hand hammered brad nails as I don't have a nail gun at the moment. Any advice would be greatly appreciated!