That's great info. Never thought most of the problems would be wire failure. Usually, I size things for up to 90/100C temps on max current scenarios, so I don't have to deal with the inefficiency of temperature on the coper. This usually means good wires because of the isolation materials. Just to kind of never have to deal with them again. But I see what you mean... Maybe its overkill to think I as used to thinking, but at least I would never have to worry about wires.

I am really waiting for the new (lithium) car batteries to become cheaper and then those will be the ones we can buy like "dead car" batteries and still have some fun with them. Just because the drops on them in parallel will not be an issue compared with what cars demand... =)

Good stuff mate, keep up showing people your skills.