This is a combination gimbal lock/lens protector I designed for the DJI Mavic Pro. It installs from the front and utilizes the tabs that the front feet of the gimbal ride above. It must be printed with a flexible material, I used Ninjflex Semiflex (regular NinjaFlex was too flexible). There have been many cases where the small plastic tab on the back of the camera/gimbal breaks in transit where the factory gimbal lock slides in to hold it in place. This is a simple solution that bypasses the need for the factory lock, and it holds the gimbal in place just as well if not better.
*UPDATE 4.9.17- I have added designs that will fit over the Polar Pro Cinema series as well as the Taco ND series of filters. There is a "PP" and a "T" on the inside of the lens cap for easy identification.
See the video below for installation.
If you have printed with flexible material you know that it takes a while to tweak your settings to get it just right, so I'm not going to go into my setup as each printer as well as material used are vastly different.