So, in my next build, I've decided to ditch AIO's on my CPU and GPU and go with custom loops. I know the basics of things to buy, Pump Reservoir Tubing ETC. But what i need to know is the finer details. Like What size tubing to buy? What size fittings to buy? How do i even tell what size the fittings are? How do i Actually mount the tubing to the fittings? If there's any water cooling expert out there, I'd appreciate an answer to these questions. Thanks!