I hope these help a little. They might be a little wiffly waffly (and the first couple of seconds seem to have been cut off on both!)
Basic Block Editing
More Advanced Blocks*
? Trying to locate this one still!
I realised one thing I was not correct about. When using a darker slab, the heading titles DO have a color selector available on the right, so you can in fact add a black title to a dark slab…(don’t do that!)