You’re probably correct JCC... but from what I hear they will only recert the shield ONCE.... either way in the theaters in which I play nobody has ever checked my SFI tag or whether I’m even running one..... and the mass of the smaller 904 doesn’t explode like it’s dump truck big brother (which can also be addressed...). I could probably go to a blanket and that small “flywheel” shield since my floor is removable if the need for current dates ever arose