The bottom seat only had 3 holes for the seat plate to be installed. When I called the toll free number in the instruction booklet I left a message with all the details but never heard back from anyone. I improvised the installation instructions. The chair itself is pretty good. I’m 6’2” and 225 lbs and the chair fits me well especially on the lower back support area. I just wish the back area was a few inches taller so that it would be a good head rest like the chair I’m replacing. Then it would be great for even taking a nap. Time will tell if the chair is durable. If it lasts 3 years without issues I’ll be happy
This is a big chair - which is great because I’m 6’1 350 pounds. This chair fits me like a glove through the hips and the arm rests line up perfectly for me. I can lean back in the chair and unlike other chairs I’ve tried it feels like it can sturdily support me. Chairs are unique and you have to try them out so it may not be for everyone. But after two weeks I’m very satisfied with my purchase.