I started working on SAB3T in March of 2015. It took me about 2 weeks of evenings to get to this point:

There were a number of problems with this design but it accomplished what wanted to create. Mechanically it wasn't stiff enough. I used 1/8" baltic birch plywood for the frame becuase I had a spare sheet of it, but with how long and narrow the outer and inner frames are it would flex if the servos moved to fast. I'm using 2" long screws as standoffs to hold the whole thing up. Unfortunately that isn't quite tall enough and if the servos move the screen to too great an angle it hits my workbench. I also goofed up my touch screen measurement. I accidentally wrote down the measurement as 1" wider than it actually was, so I had to hot glue the touchscreen down instead of using the brackets that I printed. Last problem? The whole thing is to big! I wanted to have this on my desk at work, but it took up too much space. Time for a revision....