Geoff, maybe your statement should include that there is a tweak for every system as nearly all audio systems (equipment and room treatment) vary. What works in one of my audio systems does not necessarily work in my other audio system the same way. However, the SR fuse had such an obvious and apparent improvement over stock cheap fuses that an equipment designer thought it was easy to upgrade his equipment after hearing it without a double blind test. Frank knows that a few (6) high quality capacitors in the right place changes a now cheap DVD player into a world beater CD player.
We have done double blind tests on his IC cables from earlier to later versions which have great similarity. They require this type of test to ferret out what we like and dislike concerning the new versus older design cables. We use different types of music repeated on a CD recording with a third party organizing the CD. Then we listen, make comments and the cable designer decides what he will do next to his new design to keep it or start again and try something else (really subtle changes such as 26g. silver ribbon in place of a 28g. copper ribbon to obtain more open highs).
We have done double blind tests on his IC cables from earlier to later versions which have great similarity. They require this type of test to ferret out what we like and dislike concerning the new versus older design cables. We use different types of music repeated on a CD recording with a third party organizing the CD. Then we listen, make comments and the cable designer decides what he will do next to his new design to keep it or start again and try something else (really subtle changes such as 26g. silver ribbon in place of a 28g. copper ribbon to obtain more open highs).