[KGood]

To start, this would most likely be barred from use simply because it's designed as a loophole tactic; judges try to eliminate that as much as possible because it's not in the spirit of the game.

Also, wouldn't this violate the finale configuration rule <R10> which says the maximum "regular configuration height" is 60 inches, meaning the robot can't extent to the height you specified because the bar is 7 feet above the ground?

Also, I can't cite the rule off hand but robots can't interfere with the ball-return mechanism...I'm fairly sure the judges could use this to disqualify your bot in attempt to keep out loophole designs, like I said in the beginning.