Thank you to the original maker for adding the Fusion 360 file. Added #4 countersunk screw holes and removed the VESA mount piece. This sits behind a basement wall mounted TV so the Roku cannot be seen and the VESA mounting holes are in use by the wall mount. Have a small honeycomb storage wall below the TV which will hold the Roku remote.
The opening is large enough to have ethernet (although mine is connected via WiFi), HDMI and power connected.
The author remixed this model.
Removed the VESA mount section and added #4 countersunk screw holes.