In this first video we start with the big stuff. Mainly flattening the bottoms of the slabs, squaring the edges, and making them parallel. Also, I look at the placement of the legs and how that correlates with the vise that I am going to be using.
I do want to mention that I am not covering the gluing up of the two slabs. The reason is that I have nothing new to share and that process has been covered by many many people. I simply smoothed up the mating surfaces of each 2x6 and then applied glue, clamped it with every clamp I could find and let it sit over night. Once the glue dried I did a little cleanup by hand before throwing them through a surface planer. It was the easiest option for me and saved me tons of time.
But, just because I used a surface planer to clean up the two main faces doesn't mean the slabs are ready to go. I still had to flatten, untwist them, and generally square everything away to make them ready for the undercarriage to be attached.
I will also note that I spend no time (outside of the surface planing) on the top of the bench until it is assembled. The top is not very important until it is attached to the base. Then it can be flattened.