The outputs reminded me of ravari's road (didn't play back then, but puzzle looked cool), so here's doar s'iravar, making all the metals with just a gold input and only rejection.

I optimised for IC, because I feel that solve is more interesting than IGC (it is possible with 180G and 5388 instructions, this implementation is left as an exercise to the reader).

The topright outputs gold, topleft silver, left iron, bottomleft tin, bottomright copper and right outputs lead.

right also outputs gold sometimes, but this doesn't matter because it immediately grabs gold again.

For everything except silver and iron, the rejected quicksilver only gets outputted after a gold grab, so the quicksilver suppresses the input, and atoms can also be rejected the next track loop (for iron, it doesn't matter, because silver outputs every track loop, so it can always reject).

Once it's in a steady state, it needs 7 track loops (252 cycles) to output everything once.

Latency wise, lead is the slowest, so the optimal starting position of the arm is left of the gold.

I did try with division too, but it was too easy to make everything output in a single track loop.

Also, the layout looks like a bird mask CAW CAAAW.