Other than the brass pb, JC said the atty was phenomenal..
There's no denying that a brass post and nuts will turn green black from oxidation within a few tanks no matter the temperature. It needs to be cleaned very often and its a PITA if not close to impossible to clean those small parts with all the micro recesses. Add to that, water and a lot of elbow grease won't cut it. you need special cleaning products for that. Whatever the small gain in conductivity (I never felt any difference) is not worth the hassle imho. Offering an ss set to those who want it would have been very wise...