[gbrettmiller]

When say "single bumper" or "single rectangular piece", I am assuming that what you mean is that you connected the bumper segments together at the corners so that they could be manipulated as a single entity, not that you had a single, rectangular bumper segment with a backing made from a single piece of wood.

If that is what you are talking about, I believe that you will be OK as long as each individual bumper segment - defined by the bumper backing - meets the requirements for a bumper segment.