I have a 2011 Fox 40 and recently did an oil change on the lowers. While I had the fork apart, I cycle'd the damper side rod through its travel. When it got to the last ~15% of its stroke, you could feel a very slight "notch". I doubt it would be noticeable while actually riding. I haven't noticed any weird effects on the adjustments or anything, and I wasn't sure if the oil was possibly changing through a circuit or blowing through the shim stack or something in the travel thus causing the "notch" feeling(I am not up to speed on how the internals work exactly, plan on learning though.) Is this indicative of needing a service? I have no idea how many actual ride hours are on the fork, it was on the bike when I bought it and very lightly used. I know I personally haven't put more than 50 hours on it for sure. On another note..every time I change the bath oil, the spring side is extremely dirty when compared to the damper side. The damper side always comes out the same color that it went in, meanwhile the spring side comes out tinted pretty black. Any one else experience this? The original ti blue spring that came with it, snapped the seat off and had the blue coating worn off pretty bad. Wondering if that's whats accumulating in the oil? i've had a green ti spring with a long section of shrink wrap applied to that would hopefully keep it from wearing the coating off inside the stanchion.