Magnaplate is shipping again for AP equipped Teslas. Check their website.
I have been a proponent of Magneplate in the past, and I've made several posts on TMC recommending it. It is the only mounting bracket I have used on my P85D to date, since receiving it in December 2014.
In my posts, I have mentioned that one negative was that the suction cups did not seem to adhere well, and I did say that it might have been due to Opticoat Pro having been applied to my nosecone, though I don't know if that was the case or not.
Earlier this week my car was being taken in for the second annual service and Ludicrous upgrade, and I had removed the Magneplate because I also have my EZ pass transponder attached to it, and I didn't want to pay tolls, as I have in the past, as the car was transported. When the Tesla rep inspected the car for damage, he noticed indentations in my nosecone, from the suction cups. So the bottom line is that the nosecone I was trying to protect from drilling with the Magneplate was actually slightly damaged by it. When my car returns, I'll take some pictures and post them.
I'm not trying to bad-mouth Magneplate, and I'm not suggesting anyone not buy it because of this. I am just urging caution. If you have a Magneplate, or if you get one, I'd pay very close attention to whether or not the suction cups are attached to the nosecone and whether they stay attached consistently.
I'm going to be trying "The Law", and I'm hoping that a plate mounted in it will cover the spots that the Magneplate has made on my nosecone. To be fair, I'm also going to put padding of some kind on the back of my license plate, to avoid having it damage the nosecone further, as I have read that the plate itself can hit the nosecone when mounted in The Law.