Yeah I really need to break down and learn how to do that. I am getting ready to do a build in a MI-6 which has an inverted motherboard that sits directly above the PSU so really short 24pin and 8pin EPS would be really nice.
It's honestly really easy. I've sleeved a couple psus before using paracord but I've never crimped atx pins before. The most difficult part is making sure the paracord is melted enough on the pin that it doesn't add too much girth. It can be hard to get the terminal into the connector.