@petricor just know that your cable management is absolutely the gold standard for Skyreach 4 Mini and S4M-C cable management I've ever seen, hands down. It's black, its sleek and not too thick, leaves plenty of negative space for ventilation of heat, it's amazing!
You inspire me to want to sleeve my S4M-C's cabling, although i wont lol, as its all already matching in the stock black cable format, and they're super thin, allowing maximum ventilation without blocking airflow
EDIT: I also have to ask, do you still have this build? If so, what use case do you use it for on the regular?, as i notice you're also building that beastly water-cooled S4M lol