I'm a bit of a novice when it comes to water cooling - I have an aio cooling loop for my gpu and a pretty good air cooler for my cpu, but I just want to spruce the pipes up a bit. I'm thinking about copper pipes with compression fittings and adding a reservoir and that's about it. The barbs on my radiator and gpu block are 1/4" ID, what size copper tubing would I need and also what size compression fittings would be needed? I know most reservoirs have 1/2" threads, so I could just get a 1/2" thread to 1/4" barb fitting (do they sell these?) Also what is a G1/4 fitting - i've come across this quite a lot and I still don't know what it is. Thanks a lot!