Why were the ingots mostly round?

[B.I]

its a good question, and one i look forward to 'spectating'.
jim, i think that we need both here. anns historically academic anaysis would be great, but also greg is as hands-on talented as they come, and i would like to hear more from him. i think if we tickle his curiosity enough to get him to expand his opinion, we will be pleasantly surprised at the results :-)