First, forgive my English. I am from Spain and I use the translator. Has purchased Runner 250pro version RTF with 1080 camera. I have flown 30 - 40 times and I can say that it flies very well. In GPS mode it is very precise and pleasant. I did not have any problem. I always follow the instructions and advice of this forum. I thank you very much for this forum. as he said the perfect GPS mode. RTH - perfect. The FMD modes I mean circle flight and intelligent flight - perfect. Camera and FPV - perfect. I really enjoy the drone. Only manual mode does not give me any confidence. I will try to explain. In manual mode go at full speed the drone goes up pariba. I explain . when I go to high speeds drone goes up I put an altitude control estics near 0. When turning right or left is unstable in speeds. the controller is well configured. the mix is active and works. The GEAR setting is as explained here in the forum. -100 0 +100 changes MIX 0 1 2. Could you help me ? It's a bit strange. as he said only manual mode. everything more perfect without any problem.