The StackSplitX mod is a simple way to allow you to split stacks and buy items in a custom amount by overriding the default Shift+Right-Click behaviour.

It works with all items, though it's possible the developer has missed some so if that's the case, you have to let them know. It works with all items that have a data value, so it works with items like armor, food, potions, and so on.

To open the split menu simply Shift+Right-Click an item. To view the release notes please visit the website.