--------- Cheap Ball Heads ---------
If you are really cheap (and don't mind waiting a while) - https://ebay.to/2WPPjpT [Affl]
I designed this little tripod after being inspired by similar tripod designs, such as this one from Adam Miklosi: https://www.instagram.com/p/BvCc_EIHlgo/
The design is fully parametric, meaning you can change the parameters and the design will automatically update. See the parameters photo in the gallery to see the changeable parameters. If you use the included Fusion360 design files and share a new iteration here, please include it as a 'Remix' of this design.
Also, no commercial use please (:
You can follow some behind the scenes design and engineering stuffs here: https://www.instagram.com/engineer_and_camera/
To fold/unfold, you must loosen the screw and allow the legs to separate slightly. This reduces the clashing and allows the legs to be swung out. Then tighten the bolt back down. I installed a wingnut and washer on my tiny tripod to make this easier.
Wingnut and washer with 1/4"-20 bolt