Can you tell or PM me what is that "advance" method?
I haven't seen them actually. You know, they keep it a 'secret'. But I am very certain that some of them are not using the backward 4562 anymore. The only way is to go to CT and ask those people if they have more than enough. But, you know, they may not tell U and they are secretly using them for competition while others do not have a way to get the same stuff.