I'm ready to purchase a FCB for my 330 build and need certain features that I wonder if they all have. I have a toy quad that shows leds lit until the battery is low then flashes them. Do FCB's all do this? Also I notice my toy quad says it has a 6 axes gyro while I see the FCB's have only 3. What do I not understand? Do the Naza, CC3, and KK2 boards all have features to operate the cameras? Can I install a GPS on these boards and what is the altitude feature I saw somewhere? Thanks for this info...