If you'd like to order one of these printed, they are available through my website: https://bit-district.com/console/sega-dreamcast/usb-gdrom-tray.html
The USB-GD-ROM Controller is a device that replaces the ever failing disc drives in Sega Dreamcast consoles. These are great devices but they leave a very large space open inside the console meaning you can easily, accidentally drop your USB Stick inside the console and it leave a big ugly open hole under the lid. This tray is designed to slide down on top of the USB port on the USB-GDROM device and seal off the inside of the console dramatically improving the loop with the lid open and making it impossible to drop your USB stick inside through an open lid.
I've also added an alternative "external" variant for those who have the older USB GD-ROMs with an External USB Port, this creates a simple storage pocket under the Dreamcast's lid to finish off the space.