Sills came out great, with the correct leds in the ends of the plexi there were no hot spots anywhere and no attenuation of the light along the length of the plastic.
Did the doors yesterday. Considerably more effort. Have to drill out the sonic welds holding the door handle trim strip in place.
The holder for the light strip contains a small package with a much larger led in it. I couldn't source the led anywhere and the size let me install a standard red SMD into the spot so I removed the factory unit and then bonded and hot-glued it into place.
Because the lens of the led was larger than the light pipe I got a hot spot on the led end, so a little careful marking of the plastic with a sharpie took down the brightness near the led.
Buttoned back up and powered with a test box at 12V.
After integrating it into the factory wiring and then plugging it into the door I didn't have any light. Took a while to figure out what was going on. Screw you VW, who the hell uses a black and red wire in a DC system and assigns the black to be 12V? After flipping the polarity of my wiring everything is good. Need to get some final shots with a decent camera.