Dave, the photo of the sole was before it was installed and the hatches had not been cut in and the table wasn't reinstalled yet. The settee by the mast compression post had been removed by a previous owner to (improperly) install a diesel cabin heater. You can see the scorch marks on the bulkhead!
Tom, there were curved corners. I collected a variety of bottle tops and other round items to see which ones would fit the corners closely. I then cut small corner pieces of templating plywood using the correct radius. These small pieces were fitted in the corners, then the edge pieces were placed next to them, and both were glued down with another piece of plywood strip over the top. The photo doesn't show these corners well because that was a middle piece with only one corner. You can see that individual corner piece just behind the bucket in the photo. I cut the sole plywood very slightly oversized on the corners and sanded it to fit. On the 30+ its only 1/4 inch plywood for the sole, and there is a little radius all around the edge that required the bottom edge of the sole to be sanded to fit. The template gets you close, but there was quite a bit of final fitting required to get it all flush.