Which 3D-printed prop for 65161 120kv

I start building my first efoil. In the next days it will be ready for the first ride. The first test in the pool was made with the original flipsky alu prop reduced to 140mm diameter. The power seems ok but there are some vibrations on the mast.
I want to print a lighter prop.
I use the flipsky 65161 with 120kv, 12mm shaft with pin and M8 screw on 12S Lipo battery.
What do you think is the best design for beginner (low speed and much efficency). What design will be the best for beginner and can you link me the stl?
Thanks a lot.

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hello @MBard did you find a good 3d printed propeller ? i m looking for the same. thanks !