[Feature Request] Check for Custom Modeldata on Item

[ImBadInGerman]

What steps will reproduce the "bug"?

1. Create Item with a custom model data (e. g. Stick)
2. Register it with "/cp create specialcompost 2"
3. Create another item that is the same as the first but with a different custom model data
4. Register it
5. Repeat Step 3.
6. Try putting all three items in a composter

It will take all three items.

Is it possible that it checks, before an item is being put in a composter for the custom model data?