I'm slowly starting to gain momentum in my Substance Materials. This one took me maybe 6-8 Hours inclusive rendering.
Made a lot of progress after my first 4 hours where I almost lost trust in myself.
After a little break, I was able to flip it and rework it to an extent where the original has almost nothing to do with this final result.
You gotta love procedural workflows. Fixing little things at the start of the tree can make a huge difference at the end of the tree!