After designing the D-LZ127 Graf Zeppelin Airship model. How can I miss the same type sister D-LZ129 Hindenburg Airship? Since the original plan is a sister model, it only needs simple modification when designing. But in my work, I discovered that the difference between the two is very big. This led to the need to re-collect and organize information and overturn the original design. A lot of time was wasted......