I purchased 2 reasonably priced GRBs at the 2023 CAM expo - result of the sale of Hachette Crane parts. I then had to decide how I could use 2 GRBs in a model! I came up with the idea of two contra-rotating GRBs each supporting some 'fish'. It is powered by a 3 volt 'cube' Meccano motor. As well as the fish, the model sports a figure purporting to be Neptune, there is a small 'treasure' chest (containing washers as the treasure) and 2 small yachts 'sail' on the top. It came 7th (out of 7) in the Theme competion at the 2024 CAM Expo in Espallion