So I'm buying some new pads for my SLX M-675 brakes and there are a crazy amount of compatible options out there. Is there anyone who can decipher Shimano's brake pads coding? I am assuming it works as follows, correct me if I'm wrong: -The first letter obviously refers to type ie. G...=standard non-finned, F...=finned & J...=revised fin angle design? Are there any other types that would work with the M-675? -The middle numbers refer to pad compound ie. ...01...=resin, ...02...=revised resin, ...03...=metal & ...04...=revised metalic? Does anyone have insight as to what changes were made to the newer revised resin 02 compared to the original 01? I'm not so interested in the differences between resin and metal, as there is a ton of info out there. -The last letter refers to backing plate material ie. ...A=aluminium, ...S=steel, ...Ti=titanium & ...C=combination stainless steel base plate with aluminium fins? These obviously effect heat conductivity. So aluminium will allow heat to pass through realitively quickly thus a greater risk of boiling the brake fluid? Stainless steel and titanium will not allow heat to pass through very easily, thus heating up the rotor and a greater risk or brake fade?