I`d start at about 10 on the long one and do 5 on the short and see how it goes,or you could try 2 rigs the same lenght and put one on a semi fixed lead and the other on a running lead and compare the results,I`m assuming you`re using 2 rods is that right,are the fish deffinately in your swim,is the water a new one,try talking to the other anglers,obviously don`t try and interogate them but just ask for a few hints etc.most will help some won`t but don`t ask don`t get.