Adding to this, the heavy duty with lightning have a bigger friction area compared to the normal 2.3 thick one piece, somehow every place that sells Hope as a picture for the one piece have the heavy duty with the lightning, which makes it confusing as it’s not what you’ll get. You can custom order those and it take ages to get them, also they’re quite heavy a 2.3mm one piece sits at 222gr for a 203 rotor, the Hd ones are over 250gr for the 203