I purchased a stadium that has everything stock. Please tell me what would be a good motor brushed and brushless to upgrade to. I would also need to know what else I would need as fast as speed control and should I put bearings and or metal gears if they are available. I had a tamiya hornet growing up. I can't wait to get started. Oh yes this battery is toast so help me out with what to stay away from and what I should go for. Thanks