Review on VIVO PC Mount - Adjustable Strap & Steel Bracket Holder for Under-Desk and Wall Mounting Computer Case, Black (MOUNT-PC02S) by Chris Bhatia

I really appreciate their simplicity. We use them for our two PCs to attach to the underside of the table. Allows you to move the table without pulling cables from the back of the tower. Also allows you to vacuum the carpet under the table. Adapts well to any tower size, although setup is a bit messy. You only do this once so it's no big deal. It is assumed that the top of your PC case is a flat surface. If not, you may need to make some changes.