Sadly the Chimera Labs (why are these places always "labs"?) tutorial doesn't actually create a real Litz braid. But then again most audio places don't either. Although the tutorial does touch on the history, it does fail to understand what is going on, and has the usual slab of pseudo-science and mumbo-jumbo.
Bottom line, you can build your interconnects out of Cat-5. This cable is made of four twisted pairs. (As is any Cat-3,4,5,6.) The pairs are designed to reduce cross coupling and are used in differential signalling.
You could choose a number of possibilities, and run the range of possible trade-offs.
One, you made the classic mistake of implicitly assuming that somehow the "signal" part of the cable is more important, and that the ground, is somehow less so. Ain't so. It is simply a matter of convention in what we call signal and ground. The electrical energy doesn't know you called what wire what, and it will obey the usual conservation laws and travel in each equally.
So, you have a few choices.
For a stereo interconnect you need essentially four conductors, but since the plug combines the grounds, it becomes three at each end. But you should always recognise the send return nature of the circuit for each channel.
But choices are to use both wires in a pair, solder them together at each end, and call it a single conductor (the audiofools might call this two wire Litz). You lose the inherent noise immunity offered by the twisted pairs, but reduce the capacitance.
Alternatively, take one wire from each pair, combine these together as the ground, take two of the remaining conductors, combine these as one channel, the remaining two the other. This provides the best noise immunity at the cost of the highest capacitance.
Not recognising the way in which Cat-x cable is built as four twisted pairs, and treating it as 8 separate conductors will simply result in close to random results.
If you have a very high impedance circuit you might just be able to hear the difference in cable capacitance in changes to the high frequencies, but with most modern designs you would be hard pressed to do so.
Consider that Cat-6 cable is capable of sending Gigabit Ethernet over distances of 100 plus metres. Gig-E needs a bandwidth of close to 10GHz in order to transmit this. Even Cat-5 reticulating 100Mb/s Ethernet needs 1GHz bandwidth, and can run for much longer than 100 metres.
