I've got the Wadia dac and Wadia transport with a AT&T ST Glass interconnect (not coax or plastic spdif) and I use Audionote silver cables (bought trade not retail!!!!) for the interconnect.
This combo still sounds stunning after 20 yrs of use, I can't find any reason to change.
I remember me and my mate attending a hifi show on behalf of a Amplifier manufacturer (Valve) in Eindhoven in the Netherlands, and we heard about his German chap called Albert, anyhow being the most skeptical pair when it comes to tweaking this chap had little stands under the speaker cable and rolling steel balls running on tracks along the tops of speakers.
As you could imagine we left the demo room highly dubious about the whole effect it was having on the sound, so we said come to ours and see what you can do for us
so he dully arrived with his 'brown box' of bits, he then placed this wooden cube onto the Turntable plinth just by the front of the tone arm we we're using and the effect was immediate, the sound became more 3d. so we both got to play with this cube lifting it on and off, listening to the before and after
, Albert had other cubes/things in his box we tried them on different parts of the system but none was as certain in the apparent effect on the music being played as the cube on turntable
Looking closer at the cube which was about 3cm square with a small 'Pin' slightly sticking out of the bottom, this was coupled to a spring inside (Cube was sealed, Albert did not speak english so using good old tech sign language
To this day we still talk about the 'Albert effect' which was much better than 'Peter Belts'
tweaks, still trying to work out how it made such a difference.