I just got an email from my contact at my local BMW dealership this morning stating, "using the spare lamp I got for testing outside of the car, he [shop foreman] reversed the polarity and the LEDs lit up." So I am hopeful that they can get it working for me; of course, I'll have to pay them, but I'm hoping that it will only be 1 hour or less of their labor time.
As for the side skirts, I agree. Everything else was a direct bolt-on. I would figure that you plan to pay for a similar custom side shirt solution OR budget to tackle the 1M rear conversion. I will say that although my installer did mention that it took him 20 hours, which I assume 10 hours for each side skirt, he did not charge me for all that, but he has helped me with many of my car projects over the years and is helping me to finish my dedicated Porsche track car project.
