Thanks for your response and explanation. That is good. I was just interested in having a look at the Customizer upgrade which looks really handy.
Probably I will leave the specific site alone where I have made changes to the SlimPlus Template (cannot remember exactly what changes I did!) but will look to use the Customizer for future sites where I use Connections Pro.
Gotta say that Connections Pro has morphed into a very powerful and very flexible product due to your hard work constantly improving the product. Well done and thanks!