where it mounts to the bars is suppose to dampen it but obviously isn't. gopros are a cmos camera and are really tough to tame especially 1080p. 720 is easy.......
the dji motors aren't the best quality looking for something smooth. is there a way to dampen under the camera or is the gopro holder part of the gimble?
this is the earplug mount, fpv gys use it cause it's cheap and works. Other than that there is a mat
http://vibrationmounts.com/Store.asp?Page=Products8.htm
the green one
this is the green mat, no prop balancing 1080p
this is the earplugs
i know you cant do the same exact thing, but your gonna want to find a way to dampen it better than what you got. Wind is gonna make it even worse
Those rope dampeners work good too. there braided wire like this
http://vibrationmounts.com/RFQ/VM05030A.htm
might work to mount the gimble on something along that line.