When I interviewed Roy once, he told me (what he thought to be) "the key" to the Now He Sings sessions. He said he and Chick rehearsed that music as a duo for a while, and then brought in Miroslav. Interesting, I can hear that. OK, back to that cymbal.
I have always said, (and I think it got back to the Sabian R&D guys through a friend who is a Sabian endorser,) that if Sabian screws this up they were idiots.
Years ago I had an older 18" HH Brilliant Flat that was THIN! That cymbal was (aside from my 602 Thin Flats, 18" and 20") the BEST flat that I had ever heard and (aside from my 18" 602 thin) the absolute closest cymbal that I had ever heard to the Now He Sings flat.
They nailed it years ago, and they didn't even know it. Once I got my BELOVED 18" 602 Thin Flat, that Sabian became an "extra." And someone begged me for it, they just really loved it, so I gave it to them. It was an AMAZING pie!!!!!