Building a desk top and table top for my sister's store using ash. Got some beautifully figured boards, but of course they're too wide for my 5 1/2 inch jointer. So, after researching U-Tube, decided to build a sled for the OF1400. I already had the Infinity Mega Dado and Planer bit Infinity dado planer router bit which is fantastic. Checked my 4x8 assembly table-- dead flat. Used a piece of 13-ply birch ply, also flat, for the base, and some other ply for the sides and ends. Made it oversize in case I want to use another router with it, then laid a strip on the inside to locate the OF1400 perfectly. Several coats of wax on the base so the router slides easily. Had to notch one end so that the front handle of the router can protrude beyond the sled. Placing the sled on a sacrificial backer, I cut the groove with multiple small passes of the router bit so it's exact size. One pic below shows the setup as configured. Joined and planed some 8 ft fir 2x4s I had for legs for the sled to run on down the length of the board. After shimming my boards so they were stable, went to work with light passes starting at the lowest corner. This worked pretty darn well, and then I was able to run them through my DW735 planer to get the tops flat, then flipped them on multiple passes to dimension to same size. Will use the TS55 and table saw to get them ready for glue-up, and then domino them too.