I've really enjoyed using this well-designed case for my MiSTer. However, the power-side plate for the original 3D model does not include the USB port opening for setups that use the digital IO board. This prevents you from being able to use the USB port on the rear of the MiSTer.
So this model is a recreation the power-side Digital IO plate with the USB port. Just lay it flat, and print it out.
The author remixed this model.