My only experience is with a friend's system. He had HRS design a long, three section, three tiered rack. This thing is extremely heavy. HRS required the dimension, weight and weight distribution of each component going into the rack so that the shelves could be custom configured for each component.
I can't say what contribution the rack makes to this particular system, sonically speaking, but, I can say I have never seen a more solid and beautifully built rack than this one.
Another friend of mine was the person in charge of assembling the rack. He said he has never put together something with that many pieces that had to interlock where the machining was as perfect as the HRS rack--everything aligned perfectly and was flawlessly machined.
I can't say what contribution the rack makes to this particular system, sonically speaking, but, I can say I have never seen a more solid and beautifully built rack than this one.
Another friend of mine was the person in charge of assembling the rack. He said he has never put together something with that many pieces that had to interlock where the machining was as perfect as the HRS rack--everything aligned perfectly and was flawlessly machined.