I make more by braking them down.....steel shell>steel pile....usually 2 extruded alum heat sinks>extrude alum bin......transformer>motor bin.....lots of #2 insulated wire(1.30lb for me)>insul. wire bin.......2 or 3 copper "dingle berries">motor bin.....just finished about 18 of them. Next time I do a batch, I think I'll weigh out about 10 of them to see the weight of all separate items.....