Welded MeshPart not moving with part?

I have a part that rotates using a tween. Connected via WeldConstraint to that part is an unanchored meshpart. When I tween the main part, the MeshPart doesn’t move with it despite being welded.
How do I fix this?

Tweens do not take welds into account, you would have to cframe it instead or just have a seperate tween for the unanchored meshpart.

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Just want to add more information: Modifying the Position (or Rotation) property does not cause constraints to update, but CFrame does. You can use CFrame.new(targetPosition) * CFrame.Angles(part.Rotation.X, part.Rotation.Y, part.Rotation.Z) to calculate the CFrame for the position without modifying the rotation.

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