What can be used for ballast on a robot which is legal for use in competition? (i.e. is it only official vex equipment that can be used as ballast?)
Please be sure to read the Q&A Usage Guidelines before posting in this forum. Specifically item 3 regarding quoting the specific rule from the VEX Sack Attack Game Manual in question.
Robots must consist of parts from the VEX Robotics Design System, apart from a few exceptions stated in the manual. This includes robot ballast.