[QUOTE=Aero;977]I have the F-3x, I might be able to answer some of the q's

1. I think you only need to apply the wax to repair it (major scratch).
2. Can't answer this since I haven't applied one yet, but a vid on youtube shows that it dries up really quick with a hairdryer
3. I don't carry it for long periods of time but it hasn't leave any mark, yet. I tried to smudge it on a white shirt that I have and it only left a feint transparent waxy feel to it, nothing major.
4. Mine has the metal O ring at the back side.[/QUOTE]

Thanks, one more ques
How does the colour look

Dave