Let me say, that Brenner told me that they hadn't tested it with the Spin 99, because of the difference in Poles and was concerned about it. I decided to give it a try and used a brand new Spin 99 I had laying around because I didn't want to buy a new ESC. And it didn't last through the first flight and became a great smoke system. I now have a very nice charcoal smell on the inside of my new plane and a Mezon. If you want to risk it, you can be another data point. :-)