Started the Aerosport Products door handle/lock upgrade today. I first cleaned out all the fiberglass strands left over from when I epoxied the door skins together. With these areas cleaned out, the geared bars will slide much easier. Next I used their backing plate as a template to locate three holes that will secure the exterior trim ring, the hole for the lock and hole for the handle. After making some big cuts with the step bit, I used a 1/2" drum sanding wheel on my Dremel for the finer cuts. I ended the day by filling a couple voids I found in the door with epoxy.