My 18K B&W Companion sat on the bed and DID cause bed deflection towing at it's upper limits. They sent me a new base as it bent and spacers that directed the weight to the cross members. It worked well after.
Then they created the 20K Companion that has a spacer system and it works well.
Andersen DOES set on the bed and DOES cause deflection towing heavy RV's. IMHO the Andersen is a fine hitch but should be used with RV's in the 3500SRW class and below.
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