The drum scoops are redesigned to be smaller so that fewer pieces are dropped each time. Also I've gone back to six scoops instead of twelve, which leaves gaps between the scoops which is useful when there are only a few bricks left in the drum. 

Here are just a few of the scoop designs I've tried along the way: 

Also, after much coding, a bit of soldering, and the design and print of a case, the TOUCH CONTROLLER!