Corsaire, broken bars are much more rare than someone would lead you to believe.
Do they break? Sure, everything does eventualy.
Easton makes a stem thats designed to minimize the stresses on a bar where it clamps. There are pictures simulating the stresses of various stem designs somewhere.....on their website maybe?
Follow Johnny B's instructions and it should go OK.....
By the way...I dont race and one of those bars is going on my bike...why? Because I think they're pretty cool and I want a 'tricked out' bike.
In the 12 years I worked as mechanic I only saw a handfull of broken bars....ride....enjoy...