Well I don't know you from adam, so I might be a lunatic and you might actually be an awful bike mechanic. But you sound like you know what you are doing and for me the bottom line is this was an ultra lightweight bar at a dirt cheap price. To me that means a thin bar/thin carbon which should at least suggest the possibilty that it might be a bit fragile or with cheap price, that quality control might be an issue. On the other hand the best manufacturer's still have to warranty out frames that crack under normal use. It may be that the Cutter bars are good quality in general but that doesn't mean you didn't get a defective one that cracked well under torque spec.

I thought about this bar but the weight/price seemed too good to be true. I think I'm gonna stick with my heavy FSA bar.