Yeah, unless you're running 720p or 1080p or something then the end of the table is going to provide some problems . . . heh, but that would be really awesome.
Really the best way to go about fixing it is to just not adjust the arm position when the puck is only moving a pixel or two at a time. We do that, but as you can see, we don't do it perfectly.

: Did everyone else in the competition use cameras too or did anyone present a
: different sensing approach?

Nah everyone used cameras. Nobody even considered any other methods really. Other methods would be pretty awesome though, what else would you suggest?