Quooker Gardena adapter

Unfortunately I could not find an Gardena adapter for my Quooker tap and used a so called 'waterthief' that you can push over the tap end. This is not so convenient so I decided to create it myself based on another Gardena model posted by Hondzik here. It took me a while and multiple adjustments to create this. This is my latest version and with this it is solid and working almost perfect. If anyone can help me make this design better, please do and let me know, I have included the Fusion 360 file I used. USAGEWhen I had to first screw it on I noticed I had to kind of ‘tap’ the threading the first time, by applying a little force while screwing. I assume it is because of the fact that the print precision wasn't enough. But after that I could easily add the adapter with ease and I did not see any damage to the threading whatsoever. Also the rubber ring inside - that seals the threading from water flowing out - should be identical to the original Quooker ring. I have tried to