Heritage Grill - Light bar vibration issues

[n118nw]

While back I installed a TH Heritage Grill but used a different light bar than OEM and 3D printed a pretty sturdy bracket out of ABS--but I have some crazy vibration coming since there's no reinforcement to the grill. Is this an issue on the TH and TRD Pro or is there a support bracket that stiffens the grill that I should purchase? Included pics of my bracket and finished product

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