Mounted my 13.5 CF props and adapters tonight to give them a try. The adapter plate screws into the motor. They are not going anywhere. The plates were 38.00 and the 13.5 CF props were 21.00. Both products are very well built, quite surprisingly. When the bird was in the air I noticed it to be quieter, more responsive and it seemed faster, but I did not have the camera or tablet attached for the test flight. More tests will be done, but this was the maiden one. Disclaimer statement. I know the inspire is expensive. I know that others have charged an arm and a leg for a set of CF props and adapters that don't even screw into the motor. I believe that YOU don't have to spend an arm and leg for other accessories. Yes you can get what you pay for, but you have to do your research and be able to tell the difference. Sorry guys on the pictures. I tried everything to get them straight. This site for some reason is not allowing them to be saved that way.