So the new Freefly systems Movi Pro Gimbal basically sits inside of a Fig Rig (as seen in top left photo). If you're looking to get similar functionality with your Came-TV Gimbals, they all come w/ Quick Release Adapters so that you can mount those gimbals to just about anything. Here's a basic PVC frame you can build for your small Optimus Gimbal or Mini-3 Gimbal that can offer similar function.
Using 1/2" PVC, the corners are made up of (2) 45 Degree elbows. Top handle is a T connector + (2) 90 Degree Elbows. The feet to keep it standing are (2) T connectors and some scrap PVC capped off. Basic bike grips used on sides and on top handle (bike grips work well on 1/2" PVC). No balance stand needed to set your gimbal down, and you still have a top handle and dual side handles. Decent for those smaller gimbal systems to allow you to hold and operate your camera as you would a Fig Rig stabilizer.