OK, after more testing, please find attached 2 Test Panels, one with uiGroups on top of one another and another with uiTabs
It is definitely possible to layer (for want of a better word) Tabs and Groups on top of one another and then make selective ones Visible / Invisible.
I was struggling with my PCM80 Panel but doing things in the following order seems to work:
1 Delete any text from the ‘Component Generic – Group’ entry
2 Un-Tick the ‘is component a member of a group’, the uiGroup will leap to the 0,0 position on the Panel
3 Drag the uiGroup back down to it’s original position
4 Check that in the Component Generic section that there is nothing in the ‘Group’ entry and ‘is component a member of a group’ is stil un-ticked
At the moment that is working, I can put 4 uiGroups in the same physical place on the Panel and make only one visible at any one time.