[Lancelot]

I havent noticed this personally but I do know that a Grade A ignot is worth a grade boost on both the primary and secondary . The boost is half of Grade D per item. Or a perfect 100 pointer .

So if you want an A you probobly want grade A ignots.

As far as making a grade A ignot reliably I'd gauge you need to be 7 levels higher than the ignot recipe. So level 8 for copper or level 18 for tin and so on . You can make then at level and 7 and 17 respectivly but with te current complication frequency chances are you'll fail half the time and loose half your ore.