Johnny,
We know the suck-pop is not the end all test for how well the reed sits on the mouthpiece table. Using an onyx medium reed on my theo juanne 7* slant sig 2 I can always get a suck pop. On my 7* fiber carbon fat boy I got no suck pop using the same reed. Using my reed Geek I noticed a ridge on my fiber carbon fat boy so one swipe down the table of the fiber carbon fat boy show the ridge causing the reed not to sit flatly on the mouthpiece table. A couple more swipes down the table and that made the mouthpiece table very flat. So I got the suck pop with my fat boy fiber carbon mouthpiece. End of story. We’ll see how it plays.