Advice on front &Rear caliphers

[VNA]

The reason most people do it this way is because it is simple and it works.

Not so sure of that. 

Also with extreme heat cycles, water, dirt, salt etc, well that's the reason for the copper ease.  Brake screws have a habit of seizing up.  And as they are usually screws not bolts, you don't want damage those threads (usually a steel screw into soft aluminium)