Brass and aluminum's what I figured as well. Just did one a couple days ago. It's be nice if they was chunks of gold and silver. That'd make for one expensive VCR though. Wasn't sure if them aluminum wheels was cast or extrusion. I have trouble telling the difference. I heard heat sinks are extrusion. I had always though they were cast. Just have to hit it with a hammer I suppose. Cast doesn't bend.