spring tension is to light . Use a 5 coil spring if you can . I have had a lot of success using Camen regular springs . I have noticed that the Cahoza 5 coil spring has exactly the same tension as the Camen regular the only difference is that the Cahoza springs are plated . I dip my Cahoza springs in arm dye to stop them from rusting .Use shunts if the rules allow them .