Ok, this is only brain storming and all suggestions are welcome 
I don’t own a DuoX so when we’ll be set on the design, I might need exact measurements. The ones supplied by @mj_prod seems to be overall (including the thickness of the jacks on each sides). I will also want to have the size (height, upper and lower diameters of the rubber feet so I can fit the cavities better.
I made it so we won’t need to remove the rubber feet of the DuoX. The feet cavities will prevent the DuoX from moving sideways or even upward.
The current inclination is about 15 degree but can be adjusted to be a bit lower or higher.
The tip of the leg and front of the stand will have an anti-slip type of rubber so the hole thing will not move around when buttons are being pushed in the heat of the moment.
This version is more optimized for CNC wood machining than 3D printing but we’ll see how discussions are going.
Note: It would be cool if the Mod authorities allowed for their logo to be used … 
Front view:

View of the back :

Side view :

