Too follow up on 2018LMs post, I having pulled same 5th with normal pin box and now the sidewinder find that when entering a fairly sharp curve at speed it will give a push sideways on the truck that I never felt with normal pin box. This makes sense as pivot point is 22 inches to rear of axle and can leverage the truck. Never notice anything different except in that situation and am used to it now, but when first felt it it was startling. One of the best things about the sidewinder is how the 5th tracks more like a trailer so don't have to make such wide turns.