I just got my DHX Air back from Fox for that stuck down condition. The repair and parts description said it was a failed Q-Ring...that's "Q" not "O". I just did a search on Google for "fox q-ring" and got a pic of a Fox shock with a part marked q-ring seal #22. Even though the shock looks like something else in Fox's line other than a DHX, the part number is the same as mine except for the size designation which is probably logical. Can anyone tell what that part's function appears to be? I know it's a seal, but can anyone tell the specific areas that it is sealing for and against?...and ponder a guess where the term Q-Ring instead of o-ring might come from? I'm going riding now to see if I can blow this thing up again...LOL!