I see, looks like a I got a lot of research to do. Thanks for the insightWhat M7 capsule? A real Neumann one, with PVC that has been self-destructing for 60 years? A reskinned one? Reskinned by who? A Sigfried Thiersch Blue Line M7 PVC (I own 2) or his Mylar one? Or a Gefell from the mid 90's (I own 1)--which Klaus Heyne strongly approved of in that era? I built a FET47 specifically for kick drum and used a mylar capsule because, although I like the sound of PVC--ESPECIALLY from that era of Gefell, it seemed like mylar would be more resilient/trouble-free in the long run.