This is an easier to print design for a soda bottle water rocket nozzle that attaches to a "Gardena" or generic hose quick release connector. While there are several other designs out there, I had issues printing them due to exterior design elements that slowed printing or due to requiring support. I needed to quickly print a couple dozen of these for my physics class project so I Frankensteined together a cleaner design using as base the excellent Gardena coupling design from PhilipFlip (https://www.thingiverse.com/thing:6609061). My design has no knurling or exterior text for faster and cleaner printing, and NO SUPPORT needed!I upgraded our water rocket launch pad with a Gardena Premium Metal quick connector, but the design works just as well with generic plastic connectors. You will need to purchase rubber washers for 3/4 inch garden hoses to provide the seal with the bottle. The ones I purchased had a 25mm OD, 16mm ID, and a thickness of 3 mm.You will also need a standard '111' O-ring for the quick release connector part of each nozzle.

EditI have made a new version of this piece so that you no longer have to cut out the spots between the gaps.This is a replacement foot for the Logite