Ok, I already realized that a non-full power cast makes less slack. But in this case what is the point of the clip? So if I figure out that e.g. 83% power results 35m distance, then why I would use a clip?
Other issue is that I am not the developer neither a tester of this game so I have no time to test the proper distance of the GB, since e.g. 100 tests would not be enough since the game is realy complex, so I could not know that the distance was good or the time or the temperature, or the color of the line or the, ... so if it is not your profession then there is no chance to receive a proper result just by testing. I literally could not know that the fish was hooked due to the proeprly placed GB or just by the above mentioned reasons or by millions of other possible reason. If the game was more simple (what I do not wish) then the players would be able to test-and-try-and-receive the proper data. But know, we just have to ask, if the game calculate the physics of the slingshot on the same way as the cast? It should not be considered as a secret imho.