I'm rebuilding a 1938 Jensen car with independent front suspension by twin tranverse leaf springs (see pic). I have taken these springs off and find that they are of slightly different tension. The top spring is less tensioned than the bottom spring, so it sits a little wider when removed from the car. I would like to rebuild these springs but do not know if the two springs should be set the same, or whether there is any good engineering reason why they should be set differently, and if so, by how much? There is no surviving data on the original set-up. The springs are constructed the same, as far as I can see, with 8 leaves each. There is no greasing facility on the springs. I understand the Zephyrs have a similar set-up, so can anyone offer any suggestions about this one?