The Reese hitch adaptor #******* fit nicely in to our 2018 RAM dually 8ft bed factory puck system so we could continue to use our Pro Series hitch. Our Pro Series hitch was previously used on our 2017 RAM 2500 6ft 4in bed for just one year so we wanted to continue to use that. The Reese hitch adaptor took us about an hour to install. Each of the four feet had vertical play and needed about 4 turns to fit snugly in to the factory puck system. No problem with the cotter pins. Just straighten them out and stick them back in once all adjustment is complete and rebend. Took our 5th wheel trailer in for service 2 days later and everything worked great. The Reese adaptor is well designed and easy to install. Etrailer.com answered all my questions and the shipping was quick. Donnie C.