I see. But then, and the problem I’m having, is that whenever I try to rotate the PrimaryPart, nothing will move with it, even when I add constraints to it.
I have to go and sleep, so expect a response in about 8-11 hours.
In the example I saw, some of the blocks were anchored. Try welding them to the PrimaryPart and make everything unanchored
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Oh, this worked! Thank you 
I guess that’s why the model wasn’t rotating.