Hi All,
Update on the leaking group . Emailed Paolo with the video (ignoring all the other bits and bobs). He sent an exploded diagram and said change the larger piston seal. I took off piston and swapped it and the teflon gasket which looked a little scarred. Added a touch of Grease and reassembled. One cup and no leak, but obviously will have to wait and see.
What is a little strange is that the lower of the group has a dent and some wierd blue stuff that doesn’t come off (with water and cloth - don’t want to tarnish the chrome so reluctant to try cleaner without checking/thought).