I wanted to use my Nikon 50mm f/1.4D AF lens on a camera with the new Zhiyun Crane 3S. The only problem was I didn't have a lens gear small enough to fit this little lens.
Rather than ordering something online and waiting, I wanted to make my own. I had seen a few designs online but either I didn't have the right size hardware available or they just weren't great models, so I decided to just go ahead and design and print my own. It works rather well, although I can possibly see some changes I can make that would improve it.
I plan to make a video at some point showing how I created this in Fusion 360 so that you can make your own for whatever lens you want, too.