and change the metal not the block (because you can only make metal microblocks using RP2 metals blocks)..
EDIT: There's a bug that even if you change this specialUnificationTarget; factorization machines and dirty/clean gravels will still produce RP2 ingots (tin and copper) when smelted.. and the oreUnification still hasn't affected the factorization galena.
and change the metal not the block (because you can only make metal microblocks using RP2 metals blocks)..
EDIT: There's a bug that even if you change this specialUnificationTarget; factorization machines and dirty/clean gravels will still produce RP2 ingots (tin and copper) when smelted.. and the oreUnification still hasn't affected the factorization galena.