The hardest part is cutting out the new fender. The hole has to be bigger than what you see because the marker lights are slightly pyramid shaped (fatter at the base). Where the fender begins to roll in is where it needs to be trimmed back slightly. Yes I did all 4 lights because I never liked the marker lights sticking out and they are always the first thing to get broken. I had planned to TIG them in, but ended up using a 110V MIG with .023 wire, it was quicker as I was/am not super good at TIG just yet. That said, it will be cleaned up a lot when I do the body work with a slight amount of filler to make a really crisp line.