The balljoint from above , in the centre of the photo

The balljoint from below

The wishbone with the joint removed. You can just see the circlip groove near the bottom of the wishbone (the bearing is fitted from below)

The old and new balljoints side by side. The left one is showing signs of the lining breaking down inside the joint, leading to movement

My improvised puller to get the new joint into the hole - a length of 10mm threaded rod, two bolts some oversized washers and a 21mm socket to act as a 'drift'

The joints are held in place with spiral circlips which are fiddly to refit until you know the trick - wind them in to start with and then work steadily around the joint. The only place I've found that sells them is Caterham Cars