I bought my Phantom 2 with an H3-3D Gimbal and a Hero4 as it had just come out the same week.  What is the difference between the H3 and H4 gimbals?  The Hero4 fits the H3 gimbal fine, though it does sometimes droop to the left a little.  If it's just control firmware, will H3 owners be able to update via the online portals to accommodate the Hero4?

Thanks

I bought my Phantom 2 with an H3-3D Gimbal and a Hero4 as it had just come out the same week.  What is the difference between the H3 and H4 gimbals?  The Hero4 fits the H3 gimbal fine, though it does sometimes droop to the left a little.  If it's just control firmware, will H3 owners be able to update via the online portals to accommodate the Hero4?

Thanks