They are working great, I've been using them for a while in a DT mono and aerial brush, but when I got the xtreme I didn't get time to fit them, so after using pencils and gettingvtgrough more water and taking longer the rinse I decided to go back to fans, I much prefere them.
@pure glass, I'm using a plastic goose neck with a tecbuk socket on the brush, I prefer the angle and extra reach it gives.