Ha ha ha ha have you ever thought about a career in stand up comedy? Your jumping to conclusions again as to who people are. The other week you thought i was Adam and now you think i'm his mechanic. If not being able to sort out a puncture by changing the wheel and gearing, as it had a different sprocket on so either the chain had to be altered or sprocket changed, comes under incompetence to you then yes i guess his mechanic was at fault. Lets hang him for it.