Finished up my own custom CF7 conversion on the silver-series new chassis last night. At the moment I have no fewer than 10 Atlas GP's hanging around including that one, going back from Classics all the way to this one.
And this is by far the quietest and smoothest chassis I've seen, and if it weren't for the position of the new DCC board hogging up the high short nose, I'd give it a 9.5, but the curse of all the old Atlas units was the occasional one that sounded like a razor in motion. And with this issue, we are literally picking nits, it's about the size of one.