Pin Box vs. Truck Bed Wall: How to Avoid Conflict?

On our 5er, the body of the pin box is down inside the bed sides. And the length of the pin box is such that on a very tight turn, it can contact the bed sides. But this is a very tight turn, and once I knew it would do it, I can easily avoid the situation. Haven't gotten into any situations where I "had" to turn tight enough it would contact the rails.