I did not try the project because I have only ordered the servo.
adjusted in tinkercad, I recommend putting the glue into the valve thread and the nut or pinching the welder. The toothed wheel is free of support and 100% infill from PETG, the valve holder is also 100% infill but with support.
From the original file you have to download the second (16geared) sprocket that comes to the servomotor, which I did not modify because there is no need to use the same servomotor as my author.
Before the valve is ingested and the valve holder pulls the quick-release lug to prevent it from slipping.