Tonite I put a carbide burr in my die grinder and made short work of cleaning up the hole to the lines. I now have nice straight edges and smooth radii in the corners. I progressed with some small sanding drums in my dremel and then some hand sanding and I believe the holes are good. Following the directions I drilled the skin and shaped the plexiglass. As you can see from the picture, I covered the lens with some painters tape to avoid scratching it.
