After a bit of development time, I realised I was kind of painting myself into a corner putting all the GUI debug elements in-game. For one - you might already have a HUD. So where do I put the debug HUD? Secondly - there would be so many tabs and UI all over the screen that it becomes both unbearable and unworkable. And last but not least - how do you alternate between gameplay and HUD clicking? There is no uniform way.
So I went another route. It took me a lot of time to create re-useable components, but I'm on the way now. Materials, filters and all the other goodies are pretty easy to add now - which I'll be doing over the next few days.
Forgive the amateur recording - I rarely record the whole screen. Thank you to my son for hooking me up