as far as flex fans coming apart, any fan can. good fans are all rpm rated. mine is rated to 10000 rpm!



This is true, but I have seen(personally) 2 come apart
at a relatively low rpm... mine spit a blade at 6000
and a friends went at about 5600... If you dont want
to change it I have no problems BUT dont have you
head over it when you rev it up.