Here's my take on a bare bones diy router planing sled. There's a few other threads on how to make a really nice planing jig, namely these two from Mat UK and fabricator: http://www.tdpri.com/threads/another-router-sled.730417/ http://www.tdpri.com/threads/new-router-sled.709129/ But this'll do. Built this with some stuff I had laying around: Scrap 1/2" plywood, ~16" x 24" if I remember correctly Length of 1x3 select wood (already very square and straight) Few sheetrock screws Will let the pics speak for themselves. The piece on top is a guide for straight (enough) passes. And the screw heads on either end of the top act as stops. Cut the top slot just wide enough to drop a 1-1/2" planing bit in. The important part to remember is that you'll need a flat reference surface when using it. Already had a nice flat workbench to use this with. And this is how my tester blank (made with scrap 2x4's) turned out after a pass: Not too shabby. The ridges the bit left sanded right out. The only thing i had to worry about was not putting too much downward pressure on the router as i ran it across. The top would give just a bit if i did. 3/4" ply prob would have been a better choice.