Um.. [ She has to think about it for a moment. It takes some time to visualize it in her own head, but then Madoka thinks she has - at least - a pretty good idea of where Yugi wants to go with this. ]

I think that should be possible. [ Without it ending up looking way too odd. ] The problem is that you only have a certain amount of clay, you know? So if you want one half to be bigger than the other half, you have to make sure to try and push the clay to that side of it, taking it away from the other side, little by little.