For smaller cameras sized around a GH4 or Sony A7sII (using small native lenses), the new CAME-TV Optimus Gimbal should be a hit. The handle can be changed from a single hand grip to dual hand grip. Each motor rotates a full 360 (no limits for hard stops). This allows it to be easily inverted or any other position you plan to use it.
Do you have the rough dimensions of the Came Optimus laid down on a flat surface? I'm unsure how this compares size wise 🙂