I have been having another think about this and while I find it hard to describe it as difficult, I would class the PH Dragon as a real puzzle that took me some time to work out the first time I stripped one. Working it out took a couple of hours and much coffee but once I had worked it out, making notes on the way, reassembly was quite easy and the next time I did one it was really straightforward.
I guess once you know how to do it, anything is easy.
Cheers, Phil