Declared Shipping weights or pin weight are never good to use for weight calculations. Use the max ratings and the scales to now the actual weights. Everything else is an estimate and not necessarily pertinent to YOUR rig. For example, adding a larger fridge, second A/C, fireplace, etc, will affected whatever was documented. However, the gross or maximum axle weights will pertain to like models. You just have to ensure you stay under that and the TV can carry and pull it safely.
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