Radar Eye

 For the Radar Eye I used a resin casting I purchased online, you can find the details in this post. 

The back of the part has four casing points on it that needed to be cut off. I did this with a Dremel and then did some sanding to cleanup that back. 

To attach the radar eye to the dome I drilled holes in the back and inserted some screws that I cut the heads off. These were glued in place with epoxy.

For the eye I used a plastic Christmas tree ornament. 

I put some painters tape on the ball and then used the resin piece to mark the size of the eye lens. I then cut this out with a Dremel. Finally I pained the inside of the lens with black spray paint. 

Here is the final product.