It became apparent that one or two heavy drawers fully opened could tip the cabinet
over much like a filing cabinet or a long work piece in the drill press
or drum sander could prove to be a problem.
I used a 1" thick piece of steel (70 to 75 pounds) to act as a
counterweight in the back, below the bottom drawer.
This could also be accomplished by pouring concrete or
laying bricks into a box in the bottom of the cabinet.
The Cabinet has two fixed and two swivel 5" castor wheels.
There is a drag brake, which runs against both fixed castors. Pressure
is applied by a star knob.