I am building a Ww2 era U-boat. The torpedo must work against subs and ships. the tubes 21 blocks long, 3 tall and 3 wide. With a hard point on top with a guide rail on the bottom. I've tried several workshop torpedo's. none have worked. They all run off in a random direction. I first thought it was my tubes, and added a guide rail, it did not solve the issue. Does anyone know whats the issue or can anyone give me a torpedo you know works with subs?