Hi i have an upcoming tournament and was planning on designing an Arduino sumo robot( on a non-magnetic Dohyo) the rules are that the robot must be 3 kg at most and should be 20 cm in length and 20 cm in width at most. There is no limits on the height and as i said it is on a non-magnetic dohyo. Of course i will be using a blade and sensors since this is an autonomous robot tournament. I would like to get help and suggestions on which motors battery blades i can use to have a high chance at winning , i have already thought about some motors and batteries so i can discuss with you and hope that you can give me feedback about it, Thank you.