Sanded the top side on the 50 ft radius disc. Won't be the last time so mostly just got it all flush. That made it ready to glue on kerfing. Kerfing is a narrow strip of wood with narrow saw kerfs cut in it so it's flexible as a rope. Kerfing gets glued to the side, flush with the top edge, and another section flush with the bottom edge. Ultimately, the top and bottom will be glued to the kerfing. So essentially, kerfing expands the top and bottom edge so you have a large enough gluing surface to get a good bond, without influencing the flex in the top (sound quality).
Most luthiers have a set of 50 or so good clamps to do this. Being cheap, and not in guitar production mode, went with the clothes pin option. Did you know that finding clothes pins these days is like a scavenger hunt? Finally found some in Walmart. I haven't been in Walmart in quite some time. There's a whole segment of humanity in that store that defies explanation. Anyway, got some clothes pins. Then I had to wind rubber bands on them to increase the clamping pressure. Finally, ready. Here's some pics of kerfing and of the kerfing glued onto one half of the top side. I'll glue on the other side tomorrow. Then it's back to the radius disc to get all those edges flush again.