Planing and jointing lumber is crucial to a tight fitting and square project but… a jointer over 6 1/2" gets pricey and a planer can make your material flat but takes special sleds to get the job done. So, I had this out feed table and starting figuring the dimensions I would need to use some 1" conduit and roller skate bearings to make a easy to move flattening jig to plane my lumber up to 3' wide by 5' long. This has been the absolute most versatile and useful jig I've made so far. I milled the boards for bench I made for my mother because they were cupped and warped so if I ran them through my planer they would have just contoured to that shape so I just shim the up and use my clamps to hold the boards in place then mill them flat. I am working on a dining table and milled some 6"x8" oak boards to 5"x7" with this jig in no time at all and they end up extremely flat and square. I am also in the process of redesigning my linear rails and bearings along with and entirely new x axis bridge which once I'm done I'll post a new project of it.