I just finished a Great Planes Ultimate Bipe E-Performance and have an old spektrum AR6000 I was thinking about using with this plane along with a DX6i. The LHS told me it was not a good idea to use the AR6000 with this plane. I was told due to the location of the reciever in the plane certain 3d manuevers would cause me to lose sync with the TX. Are they just trying to get me to spend more money or are there real concerns with this combo?