This unit is better than I expected.  The price is good.  The box was intact on arrival but the styrofoam was broken.  Never-the-less the unit was undamaged.  Went together in about a half-hour with no help.  Agree with others about the lockwashers.  They belong next to the nuts not the bolt heads.  Also (and Delta admits this is a problem with several manuals) they never tell you when to tighten the "finger-tighten-only" assemblies.  Please don't forget this step or thing will collapse quickly.  Also,  their "helper" clips for installing the lower bag are unecessary,  it's not that hard to do as long as you thread the steel band through the "belt" loops.  Don't like their 4" twin-wire hose clamps so I got some stainless band clamps.  I intend to convert the motor to 240 volts as I did with my saw.  They just work better that way and you have less voltage drop in the cords.  An added bonus is an increase in horsepower due to the better magnetic properties of the induction fields in the windings of the motor.  Strongly recommend this unit.  It will also interface well into a whole-shop 6" piping system.