I had an elegant low instruction rate 4 solution and then I thought up this monstrosity. As you might be able to tell, I didn't bother optimizing this for instructions past making it period 4 and using hexarms when possible. I doubt the 4 iron stick is the optimal way to gather the atoms for a full output, but it was the first thing I got to work. The hardest part was definitely figuring out how to coordinate the reinsertion of both sources of recycled iron into the process and getting the two sources of lead to stop colliding when they got to arm 40, I'm pleased I was able to get the timing down.