For the mini prototype I used a small fridge climbing wind-up robot as the basis and use a metal sheet to test it. For the larger model I purchased a programmable robotics kit, and made a light frame. I wanted to show the function rather than aesthetics of the design since I feel that the cad model already shows the function well. Unfortunately even after downloading the robotics program at http://www.electusdistribution.com.au/productView.asp?ID=14055 it doesn’t seem to be transferring and isn’t functioning. Very disappointed 😦 !