kk2 board settings

Hi, I'm trying to setup a kk 2.1.5 for my tricopter, I'm also using a DX6i. I don't know what the best settings to fly would be. The throttle is rather touchy, it rises and falls easily. Should I use a throttle curve or would I need to change something on with the board? Also with a kk 2.1.5 do...