Editorial Review The 7075 Aluminum Bottom Frame is specifically designed and optimized for rigidity, stability, durability and overall performance on the Blade 180 CFX helicopter. It is a direct-replacement of the stock plastic bottom frame. The 7075 Aluminum Bottom Frame design provides the ideal solution for preventing unwanted receiver loosening during flight when setting up on the stock plastic bottom frame. With a rigid platform and firm hold of receiver from CNC Aluminum 7075 material, the 7075 Aluminum Bottom Frame ensures maximum stability and performance of the flight after flight for your Blade 180 CFX.