Product review (4 stars): Adjusting the legs on Acme Miami 9460 Dryer Booster
The Acme Miami 9460 is outstanding.  I just installed today and it more then doubled my exhaust volume on the dryer!  It was easy to setup and adjust but the three legs attached to the unit are not adjustable and the nut and bolts vibrated off in the first dry cycle.  I went to the hardware store and for $5.68 bought new nuts and bolts for the legs.  I drilled three adjustment holes for each leg location and adjusted for my dryer exit vent.  Worked perfectly!
1. Get three 1/2 bolts and lock nuts.
2. Get three 1 1/4 bolts and lock nuts.
3. Get six thin washers for the L bracket attachment to housing.

Would have given 5 Stars but because of legs requiring adjustment and better hardware, had to reduce to 4 Stars.