I printed these for my sister's campervan. I used the reduced size for the a1mini. I also printed them standing up with a brim so it was quicker and used less filament. Worked perfectly with no faults. I got 11 out of a 1 kilo roll and perhaps could have done another 2.

excellent print. Screw thread goes for a few revolutions so I think it would be air tight.

Worked very well. Photo shows slice file in gold. Blue is the original file from thingiverse without supports and hollow trunk.

Works ok but the plate brackets have a gap which was too small for the plate to fit in. I used a craft knife to clear the gaps.