Hello all, I just purchased a brand new phantom 2 h3-3d. I don't a have a hero cam yet but I turned it on so I can get the set up started with the DJI apps. The gimbal was moving madly and making noise. Is this normal? The store I bought it from said its normal and it would be ok once I mounted a hero cam. I'll have to wait 3 weeks until my hero cam comes in. I'm afraid it's not working properly. Please help.