Weight/balance isn’t that critical.
I have my H33D/GoPro mounted well forwards on an adapter plate (to avoid the old “props in video” problem) and it never gave me any issues.
I’ve also flown my Mavic Pro with a pair of LumeCubes … that probably has a far greater impact on balance/CoG. Other than avoiding a slow take-off … that too flies just fine once in the air and the IMU takes over.