Zoom-ring-adapter for olympus PT-EP01 underwater housing

Zoom-ring for the Olympus PT-EP01 underwater housing and Zuiko 14-42mm lens. Maybe it fits with newer models too... The inner ring is made of TPE, the outer one is PLA. I´ve printed it in one piece with dual extruders but i think it´s also possible to print both rings with a single extruder and stick them together.