Basically we have a project(1st year, high school engineering) and need to make an energy storage device to store and use said energy from a small wind turbine we had built out of spare materials. Any ideas on how we could improve the overall functionality of this? The basic premise of this project is that it uses weighted marbles and gravity to store said energy using a motor with a minute amount of energy from said turbine. I still need to cut down the PVC pipes to fit into the system but are there any ideas on how I could improve this or make it more efficient? *this is not for an exam just a basic piece of the way my teaching likes to give us hands on experience and see our capabilities with thinking outside the box* *It’s also my 3rd model without the previous 2 working as efficiently as I preferred, hence why I’m on this app*