I don't know what this would fall under category wise but
1718 had an elevator system that lifted our entire shooter up to decrease the distance and angle we had to shoot from. It also had to double as a blocker in couple matches. I saw another team with something similar but I don't remember the number.
a video of our robot that shows the lift system can be found here:
http://www.youtube.com/watch?v=u_57oeV79EA