Told ya I'd be back: Sherman Question again

I got such good and immediate help from the last thread, I'm back for seconds. The tracks, as I was warned, are a pain in the butt, but not insurmountable. Once I finally manage to get those things together, I had a question about the tracks on the real thing. I'm assuming they were part metal and part rubber, unlike the German tracks. Question is, which part is which. Is it a rubber block with a steel "chevron" or the reverse? Just wondering for the painting stage. Same with the end pin connectors, were they metal, did they rust? I've gotten a little bit done on the rest, and should probably post some in progress pics so you guys and show me everything I've done wrong before it's too late