I've been using the Velbon 630A with a Kirk head for the last two years. The allen threads on the flip locks have needed tightening a couple of times, and the rulers on the legs are getting harder to read, but it's been a great performer for me. It's also gotta be the best value out there for a CF tripod, mine came with the upper leg foam, tripod carry bag, and center column weight apron at no extra charge.