Thanks mate.
It's hard to say yet as im trying to bed it all in
The clutch pedal is a lot heavier, but not bad. It isn't silent and at the moment can be a little rattley while accelerating but only noticeable with the windows down, and it doesn't always do it.
The lumpy idle has completely gone with this and like above goes from being totally silent to a little bit of chatter but not at all bad
From what I have seen of the diff, I'm in love!!
It seems to have stopped the feel of g-force pulling you off the road. Loads more grip. Actually feels like your sliding round the bend which feels very odd lol
I will look into getting one for every car I own in future