You are thinking about developing a project using the VEX IQ parts set.
This project was developed to be part of the Integrated System that our team is developing for an integration you can access the general post here: Controller Base - VEX IQ Robotics - E10 Integrated Machine
This structure was developed to carry out the transport of spheres from gravity, you can access the file and make your edits!
It is available in: Ball slide - Escorregador de Esferas VEX IQ Robotics | Autodesk Community Gallery