Product review (4 stars): What not to do!
I over tightened the blower wheel and it cracked on the housing.  Once you do this, it is over.  You will need to buy a new housing.  I tried everything to get it off including, putting it into a vice and trying to torch it off.  Its impossible.

Other than its an efficient blower.  Watch out for clogged dryer vents because that is what destroyed the bearings on the last one buy getting too much humidity and rusting.