We mount our components using a Pem standoff, nylon allen head screw, unthreaded shoulder spacer with flange. All components are placed using CAD into the belly pan model. We extrude the mounting holes from the components into the belly pan. Then the belly pan is punched. Our belly pan is actually the frame of our chassis. After forming the belly pan we press in the standoffs. To mount the components we screw the parts down using a nylon screw and the plastic washer. Every part is isolated from the metal frame. We cut off the end of the screw to make a flush surface on the bottom.
Here's a picture.
https://picasaweb.google.com/1177698...06907256715874