Pretty straightforward. As you can see in the photo, the non-standard top I have on my Uplift desk has a lip, so I made this riser to offset that for the purposes of mounting both the audio jack extender/hub, and the control panel, comfortably flush with the edge.

The model is mostly parametric. A wildly different size lip may require additional adjustments to the code. If you have a similar desk top, I hope this can help you.