Hi guys another request for help.

I'm looking to customise the Chatter Group Lightning Page layout to add a simple Rich Text component.

I' got the record page layout defined and visible with a sample group showing, saved activated as org default, etc. 

But .. when I go to the group (or any group) the customisation is not there. I have <F5> and <CTRL><F5> to force full page refreshes to no avail. 

What have I missed?