I have made several reproduction chairs and stools over the years, all using slip seats that I made of 1/2" plywood, foam, and covering. But, how were these constructed in the 18th century? Were they done with webbing and horse hair? Were they solid and padded? Any idea what they felt like to sit in? While sitting on the pieces I made are not "painful", you can definitely feel that you are sitting on a solid board. Any ideas?