Sibling Asset Display Order

Right now Sibling assets in the left rail of an article display in chronological order, with oldest at top and newest at bottom.

Is it possible to reverse this order, or even better have the siblings display in the order they are attached to the article asset?

For us at the moment it would be more preferable to have the newest sibling article at the top of the list, while also keeping the older stuff listed, just down lower. But the ability to customize the order would be great.