I just built this up last evening. It’s built around a 4x8 sheet of 3/4” plywood. I bought some 4x4 posts and some 8’ 2x4s and took my chainsaw and cordless impact out to my shooting lane and had at it. It’s nothing fancy but it’s solid and level and will accommodate two people easily and three can use it if needed. The top is fastened with a few screws. If it rots out it won’t be hard to change.