Last week went to a local metal working club and they had a presentation on zinc alloy casting. Didn't have pen or paper so couldn't take notes but they were advocating a DIY zinc alloy; zinc, copper, and Al as much better than straightn Al for home casting. Said it was heavier, flowed better, etc. Did a search here and didn't find anything, any opinions?
I found a great website on zinc alloys a while back. It is www.eazall.com. They manufacturer zinc alloys and have a lot of information on their website. I never did anything with it though.