Leanne, I know your feeling about wanting exacting restoration, but it is your canoe and you can make it however you want. It is not particularly rare or a museum piece. Do what makes sense to you. I have seen a couple of other battened seats and seemed to recall that they appeared to have pulled the machine woven cane away from the frame. I could be wrong, but I think most Shell Lake canoes had hand woven cane. As I recall, you only have one seat.....It may or may not be original....some canoes didn't have seats from the factory (mostly Boy Scout or camp canoes), so you can't be sure if it is original or not. Hand caned seats are beautiful, and probably more resilient than pre-woven pinched between battens. Give me a few days to get to my storage unit to photograph and measure what I know as original seats on a SL canoe. Did you ever contact the Washburn County Historical folks to get a build year?