The Mellow Mosquito clone hotend has arrived, but I don't have a 25mm fan yet. I wanted to try it impatiently, so I made this adapter. I may use it this way because it also prevents rotation during nozzle replacement.
I had to replace the fan duct, reducing the size of Z by 7%. There was no need to change anything else.
Super hotend, I'm happy with it at first.
I also made the 25mm version.