This is a posthumous blogging about my process. These photos just relay a bit of my process, how I work(ed). I build the frames first (8'Hx4'W) using miter joints and biscuits. The goal was to make the frames seem as seemless as possible, while holding the integrity of the frames' "frameness" together. Keith had suggested a post-and-lintel design which would have been more efficient and easier to build, but looks a lot less "framy." Eric suggested in the crit that the frames could have been made out of molding, which actually is what I was going for, but never really thought of using that. I did think of manipulating the frame shape using the dado saw in some way, but it seemed complicated and I was still unsure if I wanted to go that far with frame decoration.

The anchors were installed second. My own theory behind this was that hte anchors would fit better if they were built according to the dimensions of the frame, which inevitably would be different from my plans due to human error. So rather than try to impose a set of angles, lengths, and widths, it was much easier to figure out the sizes of the anchor pieces more naturally.
Unfortunately however, they were also very unstable while they were assembled. The two parallel pieces on the front and back of the frame gave the whole thing stability, but had to be installed last so there was a lot of fluidity in the frames before they were put together (causing one of them to actually break, there were originally supposed to be a total of three).

The casters were installed last, for practical reasons since they would have been a nuisance to work with if I didn't need them on right away. After hours of trial-and-error on how to build the frames, it was quite gratifying and relieving when I set up the first finished frame after installing the casters! The mobility is perfect on both of them, no problems at all, except the second built frame one of the wheels is slightly elevated, probably due to an oversight when I was building the anchor.

Overall, I'm content with the aesthetics. The plywood looks great, and most if not all the joints are relatively hidden (as well as the screws). One aspect that was unplanned is the way the anchor supports the frame. Originally I wanted the support pieces to be flush with the very top of the frame, but I didn't take into account the total size of the frame and the longest pieces of wood I had available to me. That's why the support pieces lay lower than the top. Ultimately, I like this element of it, I feel if they reached the top it would be too large.