Took me an afternoon to do it last summer. Not technically difficult, just a major PITA.
The nuts get seized up so much with road muck that they are hard to release. I suggest saoking them in PB blaster or something stronger the night before.
The grommet that sits in the lower arm is a pita to get out and even more difficult to get in.
PM or email me, marko@neceg.org if you have any more q's. I think I posted something more detailed last year in the problems section as a reply to someone. I will try to find it.
Good luck.