Just need a $10 15 cm zemuse part 3 cable pack and Zenmuse H3-3D 1.1 or H4-3D gimbal.
Works like normal except no camera setting controls. Tilt works fine with new and old remote. Enable on screen display on the gopro so you can see the record button. Helps in the case you forget trigger before take off.
Everything is reversible and you are no longer stuck with a permanent camera.