I see a problem
the brass hasn't been cryo'd
By "cryoing" the brass, it may change the sonics... you are changing the molecular structure...
I "cryo" all my scissors; they never need sharpening...
"Cryoing" race engine parts is very common and leads to a competitive advantage over "non-cryo'd" parts...
To me & countless others, you can clearly hear the difference between a "cryo'd" audio cable vs. a "non-cryo'd" one... it's not subtle either...
Get two identical CD's; cryo one of them & leave the other one stock... you should be able to hear the
difference...
Cryo does not essentially mean better... I do not prefer the sound of cryo'd silver...
Also, cryo is different for different metals. For audio, to my ears, brass improves the most, followed by copper...
My $0.02,
Pete