Has anyone changed the rocker panels/skirts of their early E34 to the ones from a later E34? I'm not sure what year they changed from the factory but for example, my '89 has the dimpled, textured ones and all the pics I've seen of '92's have smooth ones. If it's feasible, I'd like to swap mine to have the smooth panels because I like the look better. Painting aside, could this be considered a DIY project?