[Tottanka]

it looks like there are quite a few "doubtful" things in your robot.
I really don't think that using orbit balls as part of your robot is legal... how can you tell between them and the once on the field?

You mentioned and showed using a suction cup to put balls in rival trailers. I will not start talking about the low efficiency and functionality of this idea, it is your decision to make. That said, i do want to mention the questionable legality of this idea, as in order to place the ball in an opponents trailer you need to have the suction cup above it, and beyond your own bumper perimeter, and that is not permitted by the rules. If you have a way to place those balls in trailers without exceeding dimensions, you are good to go, but i don't see that working well, and maybe even at all.