So I thought I'd give this a go, needless to say I probably won't be doing it again anytime soon. Soldering irons don't seem to like me very well. My temperature-adjustable station decided not to heat up so I had to make do with a 30W fixed temp pen - which was not very fun and somewhat painful.
Used Gotham GAC-4, neutrik 3.5mm male (NYS231L) and female plugs, switchcraft RA 3.5mm plugs and Neutrik male RCA connectors. The plan was to make 2 3.5mm male to female short cables, a 3.5mm short interconnect, a short 3.5mm to 2xRCA and a long 3.5mm to 2xRCA. Probably spent 6 hours struggling with soldering irons, techflex and stripping wire with my fingers (not a good decision). The space inside the connectors for soldering wires is a lot smaller than it looks in pictures, especially with the neutrik plugs - if you solder to the inside of the solder terminals (which is almost necessary to get the shield to fit over the connector) you've only got 2 or 3mm to move your iron and the cables around in. I found that crimping the strain relief on the connectors was also quite difficult. I ended up breaking it on two connectors. I'm not sure if it was the way I was crimping it, or if the cable was too large (it shouldn't been) but it would pay to be a bit careful here. I found techflex a nightmare to work with: it frayed and ended up making the cable too large to fit into the neutrik connectors, so if you're using it with these neutrik plugs you may have to terminate the techflex outside the connector and cover it with heatshrink or something.
And after all that, the long RCA cable didn't even work and at that stage I couldn't be bothered trying to work out why.
Long story short - a good soldering iron and knowing what you're doing will help you to avoid going insane.