Hi there I'm not sure if this is the right place to post but I'm wondering I have the motorised bulldozer plus 2 xl motors and another reciever and for some reason I can't run more than 1 motor at a time without the power being cut to them (and the motors slowing to a small crawl) and even with just 1 xl motor connected it dosent take much load for the same to happen, I only have 1 battery box - the one from the dozer. Any else experienced a similar problem? Could it be the battery box?