The most unique aspect of the robot
that we currently have are two long arms, mounted to the chassis with bolts but capable of some back-and-forth movement due to surgical tubing. Once a tote is far enough into the robot, the arms naturally move in a bit to straighten the tote.
These arms can be made out of nearly anything, they're incredibly easy to install, and they are quite good at corralling totes. Because of their height, they don't interfere with the cooperation platform. They might also help remove a tote or two from the landfill zone.
If teams currently have no intake mechanism and want to quickly make a good one, I would strongly recommend using ours. (Just send all of those letters of praise and adoration to Team 3807.)
Here's a video.
We're also considering some other unique things to do... for the most part, though, we just need to refine the mechanisms that we already have.