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

MoparLeo said

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 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

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I understand and thank you for your contribution. You always have good stuff to add.