The bolt through the 80/20 is the final design. Both Andy and myself use a fair amount of 80/20 in industrial applications at the day-job, and have found that the internal fasteners can move over time and would be difficult to place with the accuracy we intend to maintain with this system. With the uprights being supported under the platform with a metal backing plate/washer, we are able to create a very secure connection. Picture shows the underside of the platform, with the mounting plates/washers.
For the slides, we pretty exhaustively searched to find the exact right application. These slides are 100% full extension, which we set out as a design requirement from the beginning. This was always considered a critical feature to allow the best user experience with the drawers. We also wanted to stick to a conventional ball-bearing arrangement, as this drawer is BUTTER smooth even while fully loaded. This was another critical requirement for us. We have incorporated a closed, half-open and full open hold feature, to allow the use of the drawer in off-camber situations.
One feature we will incorporate into the production drawers is a partially nested slide. We will be able to recess the slide partially into the drawer, allowing for a larger drawer.
Appreciate the response, sending a PM with regard to the local CNC bit