Can you please be more specific in what you want added?
Do you want to inflate a D Code shape? If yes, what is missing from the current operations availalbe? Asymmetrical inflation (different values on different sides?). Is this is the request, it would be difficult to add for all shapes (inclusing custom), because some of these shapes do not have a concept of sides (left, right etc.).
It would be easiest of you could post here an image of a shape you want changed and and a description of what the change should be.