ADI has designed and CNC machined "cluster style" 6061-T6 aluminum instrument mounting plates, to further enhance the ease if installation and professional look of your panel. I know from experience how difficult and time consuming it can be, to "accurately" measure, layout and drill the needed holes required for gauge installation. These aluminum plates are relatively lighy weight after machining, (6) hole..(3.3 OZ), (8) hole..(4.3 OZ), and could very easily be inset into a fiberglass, or metal panel.... or used as a template to facilitate an accurate layout of holes. ADI's instrument's body and our bezel's design allows for a very close "stacking" arrangement in your panel. Other plate configurations may be available by special order... so please feel free to send any special needs you may have... and email us here at sales@adi-cruzpro.com