What is the flow rating on the pump? Or...what model LG do you have? When you say "centipede", I'm assuming you're talking about the sectioned returns that can be "bent" to direct flow? Most of these I've seen screw into an elbow at the top of the overflow box. They are usually 1/2 pipe thread. You could make a spray bar from 1/2 PVC
to lessen the force of the current without cutting flow too much. Use a 1/2 male adapter and a length of PVC
pipe with holes drilled in it and a cap on the end. Or, you could put in several tees instead of drilling holes in the pipe...that would have less effect on total flow.