Number 4 in the Chairs series. It's very adjustable, to allow for a variaty of different body types.
Our model here is Gloria, she'll make several appearances in this series.
A higher resolution version is available in my Upper Level Paid tier on DeviantArt.
"Number 7 in the Chairs series. I'm not at all sure if this is practical or realistic. Lets just assume that it is. It's a great way of displaying this particularly well built victim volunteer. Lets call her Jeannie."
Number 8 in the Chairs series. Another of these modular adjustable things. It would be relatively easy to build I think. The anchoring would need to be very solid. The core strength required to 'sit' in it would be considerable.
The model in this case is Naomi.