Safe disc Thickness? Odd anti-rattle/ retainer set up

Again, my point was there are 2 numbers, not just discard and most guys are not aware of the machine to spec...or what it means.
Just a little education for the other guys. These guys do not do many brake services.
BRAKE FAQ: What are Nominal, 'Machine To' and Discard Brake Rotor Specifications? - Safe Braking