Yes Bilal .. thats the most deadly part for this manually done modification, cause the one which comes canted/ vented are calculated to its metal and design.
as for this --- manually done scares ME
@Wassem: please be carefully for the behavior for this manually done act, its a front brake thing on a motor bike, so the chances of a mis-happ are way to low for a walk-out compared to the rear wheel, BTW: you yourself an engineer and I know you already have an good idea of the possibilities ---- My Best of Luck.
As I was in the scrap market this Saturday at Saleem in Ranchor Line, his assistant pulled many out but was not able to get one.
Besides this disk got many other small thing from his shop