RE: Dual rate settings
most models other than 3D types only need very small amounts of control to ailerons and elevators, rudder can be any setting on most sport type models. allways follow what the model specs say in terms of control throws and start from there for the first few flights until you think you may need more throws , remember too much control throw can make or really break a model. set your low rates to the required minimum and adjust your high rates to double.