[TomH]

It is a questionable thing. It is tied also to hurding and trying to move multiple balls with your bumper. It may just come to a point that you have to see if it is legal just to push one ball that is pushing another. If that is legal, they you just have to be carful driving, but if you mean like attempt to dribble multiple balls at a time ( kick one, then kick another, then kick the first one and so on) and have only one ball in possesion/contact with your bot, then that seems to be very legal and possible way of moving multiple balls at a given time with only haveing one in contact/possesion of your bot.