[dmitch]

The main problem with the scissor lift is that this year you have to lift 9 and a half feet to get to the top middle peg. To make this scissor lift, you would most likely have to have 2 connected at the joints to eliminate sway. Then when the robot raises this 9 feet, you have an amazingly top-heavy and unwieldy robot.

Also, as our coach likes to point out, more joints=more places for failure.

Archimedes screw is fantastic if implented correctly our team used 1 in 2009 to raise the balls from lunacy from the base of our robot to the shooter. We used a 2.5" piece of PVC that had a garden hose nailed to it in a spiral to provide traction.