I attended the Montana factory tour last November and again this January. Two different tour guides and both said the same thing about the change in ceiling design. It was changed to improve air flow in the ducts for the air conditioning. New design reduces noise and increases flow.
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2019 3120RL, 320 watt solar,
MorRyde IS, disc brake upgrade
2019 Ram, 3500 SRW, Aisin
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