At the scrapyard I grabbed up a few 1/8 to 1" round copper rods anywhere from 6 to 12" long--at the time I thought they were brass (newb mistake). Copper any good for anything other than plumbing fittings? I know they're machineable because some of them have obvious signs of being turned on a lathe (bored on the ends, center-drilled, etc...). Copper durable enough to be used in place of brass or too soft?