Redhorse, I echo everything AZ said. Like you, I am new to the 5ers, this is my first. Before I purchased my 5th wheel, I did some research and made the determination the sidewider(Reese Revolution) was the thing for me. It can be use with a short or long bed, one can bolt it solid and utilize the regular pen, No manualling doing something at turns, no additional weight in the truck, more room in the bed of the truck, no actual movement within the bed, all pivot is above the bed sides. etc.