Rob
When you say satisfactory, does that mean they will better JPS labs or Analysis Plus cables
It would depend upon the system. The effort in commercial products goes toward achieveing "good" sonic results in different systems. WIth a diy solution you're aiming at getting "good" sound for the specific application (i.e. your present components).
For example, my copper diy's IC connecting the amps, sound slightly better overall than an expensive silver commercial offering. The same cannot be said for other systems (where the commercial offering is slightly better).
Mind you, however, my main amp has a very low rated input impedance which allows me to use unshielded (if short) ICs... Cheers