Yi Discovery to 4K Lens Adapter

Bought from AliExpress some 52mm lens filters and "action camera" to 52mm lens adapter.
Turns out Yi Discovery has smaller lens ring than it's big brother 4K variant so I've designed very simple adapter ring.

Due to press-fit assembly nature I've printed this ring out of TPU to get better grip and avoid scratches on camera body due to the nature of harder plastics.

Potentially so called NinjaFlex or Nylon could be good alternative, alternatively acetone treated PLA might introduce enough "softness" on inner ring surface.

Also I'd highly suggest to print it all black and with matte material if possible (avoid bright and shiny colour material (green TPU was simply already loaded on one of the machines, I will defiantly reprint this in pitch black at 1st opportunity)