I didn't ask how much labour time was involved, but i know it would be longer than a rear wheel drive car, which was the last one i did.
I only found one post on t'internet showing how to do it and it looked intensive and fiddly, hence a long time to do.
I'm getting another quote off a friend of a friend who operates a one-man band type idea. he's been quite good on price for the other bits i know he's done.
Heres hoping...