Lead ingot (more to come by request)

I wanted to melt some scrap lead i have and designed this simple "classic" ingot inspired by this thing : http://www.thingiverse.com/thing:1655923
I hope you like it, and i want to make more for different metals.
I take requests on the comment section, for different metals.
if you plan to cast it in metal, you will have to scale it by the percentage that each metal shrinks so that the size is accurate. i have not tested it yet, but i will some day.