I'm not entirely sure I want to go that far steampunk. I suppose mixing magic and steam power COULD work like that. It's the only way you could get a steam powered limbs. But if I go that direction, other things become possible, and then it starts getting complicated. That's why I had the "Magic and technology don't mix" rule. Keeps things simple.
However, if you can give me a really, really good explanation, using the terms I've explained earlier, as to why it works, then I might think about it.