SLK Upper wishbone

Ok... There's a little play in the bushes. A mere milllimetre or so but it's there.
Ordered new wishbone (upper nearside) from Fleabay (£39 delivered!)

Have looked through the electrickonicdvdstylee manual for any "Gotchas" can't see any. Pretty straightforward swap I reckon,
Bosh out the bolt in the wing.
Separate the balljoint
Remove
Reverse assemble

or

Am I wrong?

Anyone done it?