Anyone heard of Silvercore SUT:s

Coils are made of purest 4N silver, mixture of copper & 20% silver or pure copper also available.
You can order custom made to your specific cartridge.

Due to coils low impedans the high resonance frequency and excellent linearity of this design render the use of load resistors unnecessary, according to manufacturer Christof Kraus. Sounds promising.
There´s a review from Art Dudley-Stereophile dated May-11
on cheapest model "Silvercore one to ten"
Any feedback would be most welcome.

Many Thanks!