Man I love butter (slightly salted) spread on some freshly baked bread or hot crumpets, but I digress.
You did a sterling job on that butter dish old boy and your design would grace the finest of tables. Also, good point about butter dimension variations. Although you can buy the butter I like in blocks, most people this side of the pond buy it in a plastic container these days.
Andy -- Old Chinese proverb say: If you think something can't be done, don't interrupt man who is doing it.