Only viable metal glyph is division - it demotes metals, doesn't leave quicksilver, and needs no partner.

8 access required for all the single atoms. Hence, 3 track. Elbow shape allows for easier transport of stuff.

1st output leaves tin as waste. 
2nd - lead and iron. 
3rd - 2 iron. 
4th - iron and silver. 
5th - tin, iron and silver. 
6th - tin and silver, and now they are someone else's problem.