Is it smart???

because aluminum ISN'T (compared to cast iron,)

As a former certified welder, I got some disagreement here. Aluminum, unlike cast iron, is forgiving. It will stretch and return, whereas cast iron will crack or break. It is my belief that when cast iron was invented, it was heralded as an "end all be all" substance to make things out of.....however, if those that had invented it had only known its quirks ahead of time, I think they would have scrapped cast iron in the scrap pile......where it rightfully belongs. I can think of no other metal as unstable. You can season a block for years out in the weather, press it into service and it last for years. Take it back out, set it on the work bench and it crack the next day. In my mind's eye, aluminum is stronger than cast iron in certain ways. Certainly not sheer tensil strength, but by its forgiveness alone, I think aluminum is a far greater substance.....and that's not even getting into it's repairability VS cast iron. Sorry to get off on that tangent, but I thought it was worth discussion.