Fifth wheel king pin question

[Chief Mole]

Our Sprinter came equipped with a LCI 1116 king pin. During our first tow, which was run with minimum loading, I felt that there was an excessive amount of jarring and movement transfer to the TV. The jarring and movement transfer was both vertical and horizontal in nature. My opinion is that the rigid king pin is the most likely cause. We are using a Reese puck adapter, slider and hitch. The hitch is capable of both left-right and fore-aft limited rotation. Would I have a better ride by changing out to a cushioned king pin? Thanks in advance!