I'll try to attach a file here--the pic shows a lineup of mules in the neighborhood, and the one in the foreground uses a plastic molded chair seat, bolted to a sheet of 5/8" plywood cut to fit the deck. This works extremely well, and also protects the deck. This particular mule (an A3 model) is used daily, and this seat configuration has been on it for at least 6 years. Hope this is helpful.