I'm not going to lie - The Andersen Aluminum Ultimate 5th wheel looks TOO good to be true..? This video shows the hitch and a fifth wheel in a 5 1/2 box .. I have a larger short box, so it very well may be true that no slider would be needed for me..
.. The whole video can be a bit cheesy, but the pictures of it turning in a 5 1/2 box start around 0:25 seconds ..
If this does as advertised, why would anyone buy anything else? (Obvious exception you tow more than one fifth wheel and don't want to put that receiver on all your pin boxes.)
Found this video from Anderson.. Just a shortbox video with the hitch.