The cabinet is just about at the balance point w/ all the drawers open in the photo. A slight bump and it would go over. The stability is because of the depth. The cabinet is 20 9/16 deep. I made it that depth for two reasons, first for stability and secondly I wanted space behind the systainers for storage of things like sandpaper, clamps, etc.
The cabinet is made from 24x73x3/4 melamine shelving (3 pieces) from Menards. The drawer bottoms are made from 16x96x3/4 melamine shelving (2 pieces) from Mendards. The drawer sides are 2" wide 1/8 tempered masonite (scraps from Dads shop) just glued on the side of the drawer bottom flush with the bottom and the rails at the front edge of the drawers are alternating cherry (scraps from my Dad's shop) and teak. The slides are 20" 3/4 extension epoxy euro slides ($1.80/pair) from www.cshardware.com (and the rollers even match the festool green). Casters are 4" from Harbor Freight (under $10 for the set). Total cost was around $110.
I figured this was a good, useful, but not cosmetically critical project for my first domino project. I can't believe how easy the domino made dry fitting the cabinet. Had it set up on the floor (w/o the back) with all drawers and a couple of systainers to check fit and clearance and it was remarkably stable.
Fred