i just did the same thing...guy at summit laughed and said dont feel bad you arent the first and wont be the last to do that^LOL I made a NOOB ass mistake once, and bought a regular sized(I think its 3"?) Dry-Flow for my V2 and it didn't fit, of course. Needless to say, I felt like a huge jackass n00b when I had to exchange it:laugh: