Towing 5th with an Andersen Hitch in Short Bed Truck

Thanks. I did a little online research last night, and it turns out that using an Andersen, or the Pullrite (similar to Andersen except the ball and funnel positions are reversed) or any similar type fifth connection, all void the Lippert frame warranty. However, using a Reese Goosebox, which appears to be a pinbox replacement, does not void the Lippert warranty. These cost close to $2K with tax and shipping. Turns out that Lippert owns Reese -- Gosh, what a coincidinky!