This design works fine, it is not obstruct Mavic's bottom sensors
No extra furniture needed — just snap it on Mavic and you are ready to go.
Mavic is totally capable to carry Insta360 One on board and you can get pretty descent 4k 360 footage of your own.
Flight is stable and safe
Printed in PLA - and it is durable like hell
I used one 1/4"x1" Allen bolt and two 1/4" nuts to screw a camera
I used Brim of 0.8 mm to prevent wrapping and there is two versions of mesh (one with three-like meshmixer-style supports: this one you can print without supports, and another one without this structure: this one needed supports)