Hi Rod and (others)
To be honest I hadn't posted because I did not get a lot out of what I tried and didn't wish to offend anyone after such a nice gesture of allowing me to audition the cables.
The interconnects I currently use are copper Eichmann Bullets coupled with silver wire and teflon insulation. This is braided using Malcolm's suggested technique using four strands of the silver wire which were threaded into teflon tubing. These are then shielded with tinned copper braid. I got both the wire and tubing very cheaply and the Bullets when they were on special sometime ago, the speaker cables are simply high purity copper auto wire with PVC coating (also cheap).
I did not find any of the cables that I tried to best the set up that I have built myself. The Eichmann/silver wire combo in particular was audibly better than any of the other interconnects I tried being more detailed and allowing me to see (hear?) into the music better. This applied right across the audio spectrum with better imaging and placement of instruments and much better vocal rendition as well as more defined bass.
At least I am happy to know that what I have built has been worthwhile and whilst there may be better stuff out there in the market the costs of bettering what I have would not be worth the considerable costs involved. Keith-Louis Eichmann assisted me with advice and construction of my interconnects and is going to build me some of his own speaker cables, I am very lucky to have such help living in the next suburb to me here in Brisbane! He is a very nice guy by the way and he runs the audio club here in Queensland.
Cheers
Ian