Legend with Vivid Air

Yup. I think from memory that you need regular style valve placement (valve at the reservoir end of the shock body as pictured) and position 1 or 11.

I rode the 2012 version of the Vivid Air (mid-tune) for a while on the Legend, and was never happy with it. I found (much as builttoride did) that it felt very linear, feeling fairly unsupported in the mid-stroke and reaching a harsh bottom-out easily. More importantly, I felt like I couldn't get the rebound feeling fast enough, even at full open on both beginning and end stroke rebound adjustments. Even running as little as 25% sag to raise the pressure to try to drive the rebound faster, it was still on the slow side. It is worthy of note that I am pretty light-weight at around 150lbs without gear, and this may have had a significant effect on my experience with the shock compared to Norman Clydesdale (who I assume by his name that he is surely much heavier than I...)

For comparison, I've run both the Vivid Coil and the X-Fusion Vector coil, and been fairly happy with either of those. I currently have a Fox RC4 on it but that arrived after I destroyed my shoulder so I will have to wait for next year to ride it. I have helped a crew of junior racers tune the RC4 for their Legends, and they all seem extremely pleased with that shock and I am eager to try mine out.