[MDL ED] Help with custom wheel

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From my experience, there are a few things that can prevent such a thing: 1. Enabling static physics for the entity in the level editor. 2. Having stuck states or min and max at 0. 3. Placing the entity so far into the map that the entity loses its interactive properties. 4. Improper parent and child connection.

There are probably more, but i can't list everything from off the top of my head.