At least i find out that the Piro Consistency (PC) value has the most influence in my case. At 1600rpm i have now a value of 190. But with higher PC values i have to decrease the tail gain to avoid tail wagging. Now the tail is better, but not 100%. On the other hand the tail stopping behavior is exelent. Also the holding torque in big sidewards loops is excellent. But in big backwards loops you cant fly a clean circle because the tail goes with pitch little steps away in the DMA direction. I use 115mm tail blades and the Tail ratio in my Specter V2 is 5.0 which is very high.