Really it's not too bad, you just need something flat to pry the half moon up. I used a flat head screw driver and started at the bottom, then worked my way toward an edge were I could peel the entire halfmoon off. I don't remember any clips, just the screws and tape.

The hardest part is prying the half moon without scratching paint.

Sorry i'm not more helpful, it's been a while since I had a half moon to remove.