In three days, 3467 built one of NECMP's fastest can grabbers out of aluminum shower curtain rods, string and fishing line. Here in Semifinal 1 we beat 175 who had arguably the fast canburglars at the event. Unlike many teams, to make ours larger we made a two-bar system with two cables. To extend, they fell with gravity and retracted by piston.
https://youtu.be/Z04jjIypeKA?t=5s
http://i.imgur.com/IMkwZO6.jpg
There's a CAD file somewhere but here's a
google drawing.