Ncase m1 is definitely a great case. The space is so optimized.
TG is coming from TechLens. This is a solid mod and feels like it was an original part of the case. Nevertheless airflow is greatly reduced. As a result fans have to rotate faster and the PC is definitely audible. Might change back to the original side panel to keep the db down.
Custom cables come from Pslate. I tried to do mine, I was quite happy with the CPU one but the 24pin was a disaster.