I printed the adaptor itself in PLA - 0.16 layer height - 40% infill - outer brim - no supports.
The O-rings made of TPU - 0.16 layer height - 100% infill.
Time will show, if PLA is the best for the adaptor. Probably not, but I guess my friend will come back to me, if it breaks…
Model is designed in Fusion 360. I added Fusion data as well as STEP file. Feel free to remix.
Happy printing!
The author marked this model as their own original creation.