Just finished installing my L spec bilsteins. Job was a little harder then described in the How to.
They must have changed the shocks. Instead of using a wrench to hold the shock piston from moving, you use a number 6 allen key/socket.
All in all took me about 2.5 hours, would have been much faster if I had a better jack
Shocks made a huge difference, and my HD only has 43K miles on it.