Only one support structure needed to the edge of his chin. Rest of the model needs no supports.
Vision was a synthezoid made from vibranium, created by Ultron with the help of Helen Cho, and given life by the powerful artifact known as the Mind Stone. Originally conceived as the perfect form for Ultron, the body was taken by the Avengers before Tony Stark and Bruce Banner proceeded to upload the remnants of Stark's personal A.I. J.A.R.V.I.S. into it. Upon his birth, Vision declared he was neither Ultron nor J.A.R.V.I.S., but one that would fight with them to protect humanity. Vision had then joined with the Avengers in the Battle of Sokovia, using his powers to prevent Ultron from transferring his consciousness to the internet, and allowing the Avengers to successfully put an end to his plan.