I'm warning everyone to wear gloves or use tools when replacing the wings on their Flytech Dragonfly.
The Carbon Fiber (or whatever it is they paint the metal tips with) splinters-off under the great pressure required to remove/install them..and those splinters are super small, you need a magnifying loop to see them.
These will work their way into your skin and can cause a very bad infection.
I almost had to seek medical attention for my right index finger. It took me some time to work out what caused it until I replaced the wings on a DF yesterday..and got one of these little black splinters in my Left Index Finger. Not sure I can remove it, these things are EVIL.
Word to the wise: Wear gloves and/or use tools when changing the wings out on your DF. Don't suffer like I have.