Sennheiser Earpad Adapter Oval to GSA

I've designed an Adapter to put the new Earpads from an EPOS GSP 670 on my old and beloved Sennheiser HD 380 Pros.
https://www.amazon.de/gp/product/B09FDD8XYN

Its recommended to use 100% infill to not compromise on the sound to much.
Its designed to print without supports but cooling is needed.

The Adapters are compatible with a few Headsets/Headphones. It goes on the older Oval Style Headphones with the plastic ring in the earpads to the GSA601 Earpads.

known compatible headsets/headphones:
Sennheiser PC 350 (SE)
Sennheiser PC 360
Sennheiser PC 373D
EPOS Sennheiser G4ME ZERO
EPOS Sennheiser G4ME ONE
Sennheiser HD 380 Pro
DROP + EPOS PC37X
DROP + EPOS PC38X

known compatible earpads are the EPOS Sennheiser GSA 601 used on following headsets:
EPOS Sennheiser GSP 600
EPOS Sennheiser GSP 601
EPOS Sennheiser GSP 602
EPOS Sennheiser GSP 670