regarding how easy to change. just done my upper and lower ball joints. so had to remove the knuckle and it was a bitch on mine. big hammer and not a lot of room to swing it trying to break two tapers. used a fair bit of heat as well. dont think i would have got it off without damaging the ball joints.
good luck.
List of 'real' Haynes translations comes to mind haha
Haynes: One spanner rating (simple).
Translation: Your Mum could do this... so how did you manage to botch it up?
Lol
Don't worry I know someone who didn't think the oil light pressure switch mattered if it didn't work, next thing leg out of bed at 50mph on his 300tdi defender lol