Thanks TT2 I have read your articles on the katana and thats the same one Im thinking of buying do you know if the wings have been corrected and how much throttle do you use to hover it with the os 160fx. IM not new to 3d just trying to get better I owned a funtana it seemed alright just trying to decide which would do more 3d the katana or the ucando. Do you think the saito 180 would do better than the os 160. Thanks