I did the install today on a P3S and it works great. You don't need to remove the 3 wire attachments. I didn't and had no issues. I was not able to easily remove the wire attachments, so gave up on it. If you don't remove the wires, you will have to put the two halves back together for drilling. Drill very, very carefully and slowly. I took about 6 increment drill size steps to finally get to 3/8". I'm using a full-size IPad with a mount extension arm. Yes, it is top heavy, but the image is awesome.