BJ, you can ask as many questions as you like. I love learning from others as we struggle to deal with this addiction.
As far as the rear four inch tail lights, the entire units came out and were replaced with new LED's and the four inch rubber gasket. They fit fine in the rear.
As far as the front four inch turn signals, that is a whole different deal. The fronts are requiring signficant modification with a five inch stainless steel ring to act as a retainer given the odd size of the front housing and limitations to the depth of the light. I will begin working on those as soon as the lights arrive.
Hope this helps.