It would be cool to see a part that has tubes to a small board that has two bottom holes one for letting the ball to the left and one for the right (you could even make looping stuff by putting a function in a function) one of the big problems for this is getting the main board and function board sit on the same level and still have the balls get to and from the two boards preferably without too high supports but a crank-powered elevator to move it higher (with supports) is the only way I can think of doing this