I created 3D models for printing of the Centuri PSR-78 and PSR-813 plastic reducers.
The red PSR-78 is the Centuri original, the white is my first test print using PETG filament. Centuri’s weighs 4 grams, and so does mine.
https://www.thingiverse.com/thing:3912950
My first test print of the PSR-813 using PETG filament. Weighs 8 grams.