After installation, check the clearance between the back of the pinbox and your side rails when at a 45 degree turn.
An L05 unit was installed on my trailer. Due to the possible sliding action and the possibility of hitting a pothole while turning, I decided to trim the back of the pin box.
Since I now have the hydraulic front jacks, I just lifted the front on the trailer and drove the truck in at a 45 degree angle. By carefully lowering the kingpin into the hitch, I could safely measure the amount of clearance, without worrying about hitting the side rail.