By my understanding, when you compound, you create a new metal that when burned, gives you feruchemical powers. So my question is, does the amount of attribute stored in a burned metalmind change the amount of power you get out? Could it be similar to a allomantic metal that is a little impure and gives less power, so a not very full metalmind when burned gives less power, or is it just that if any amount of attribute is stored then burned the output remains the same.