I'm moving from all extract to partial mash. I have a mini-mash tun in the works, and I'm looking to add a full size brew kettle so that I can do full volume boils. I'm curious as to which is better... aluminum or stainless? I know that stainless can be much more expensive. I also know that there is anecdotal evidence that aluminum pots have been implicated Alzheimer's disease. All the same, I lean toward aluminum because I want to drill the pot for a spigot and perhaps a thermometer. I see people using converted kegs as brew pots, and they sure look aluminum to me.