I just ordered an OME 3" lift, and was asked if I wanted the optional trim packer. It seems to be a 5mm spacer for the front left side. Being that it was 8 bucks, I ordered it, but I'm not sure if i really need it. I guess the best way to find out is to go outside and measure the distance from the center for the wheel to the bottom of the fenders on both front sides and see if I need it. Any advice on this? Has anyone else used the trim packer?