I installed a set yesterday. It went OK. I was amazed at how tight all the screws were that had to be loosed so that the tubes could be lowered and I had to almost remove the triple tree to be able to slip off each of the handlebars.
There is just barely enough slack in the wires and cables to be able to reconnect everything.
All in all, it took about 1 1/2 hours of doing it all carefully and slowly. My son helped. It is almost a 2-person job.
It went pretty much as the YouTube video about doing it shows, but which didn't show the somewhat difficult aspect of raising the triple tree, getting the tubes to slide down and slipping each handlebar off the tops of the tubes.
I didn't need to undo the headlamp clamps.