Here is what I am using:
STAND-V001L <br><br><span style=font-weight:normal;>Laptop Tray & Desk Mount</span>
What isn’t obvious from the pictures is that this also works directly with a desk that has a feed-through hole, it is threaded on the bottom for an M10 bolt.
My S-5000 case has blocks on the back left/right corners with a 1.5″ hole 3″ deep and an M10 bolt in place. Just screw the stand in and set the arm/laptop stand. This setup was done for theatre (script + qlab) or shows where I don’t have additional space for laptops.
The laptop attachment in this is via a VESA mount, so you can go either way. They also sell the stand/mount without the laptop stand.
Jay