This my version of camera gimbal controlled by servo. I am using DJI NAZA M-lite to drive it.
It is very light (75g without camera!), easy to set up, enought stable, camera fixed well but most problem is cheap servos. I am using standart 9g servo with metal gear.
Here is the video:
Also, you can find more information (in Russian) at my website: http://www.customelectronics.ru/chast-10-girostabilizirovenniy-podves-dlya-kameryi-sj4000/
SketchUp-project uploaded and you can customize it for your purposes
I am a hardware engineer. It is my work and my hobby!
You can find most of my project at my russian website customelectronics.ru