Through a discussion with Shaun I've come to realise that the current gate design would overwhelm my clips. Although it's concept works with freedom/restriction of travel relating to the breaching of the Wall, its design draws too much attention away from the screen, and ultimately the clips...
I have spoken to Kaavous at the Wood workshop about redesigning it, and will be working on a less intrusive design. I will also look in to using Mac Pro, alongside 2 Minis, regarding controlling the 2 screens. The design would also need to consider where Pro (or Minis) would go. Housing them in a bench box is an idea to keep the screen plinth slim.