Game Boy Color - TFT LCD Light-Bleed Mask
The TFT LCD mod from China is a great thing, however they removed the metal housing for it to fit in the display are within the shell. This works, but causes the LED of the LCD to been seen when in a clear shell; this bothered me, and I noticed that others suffered too.
I came up with this one-piece vinyl mask to resolve the issue; once used you can see in the images that the LED light-bleed is completely blocked.
You can also removed the metal surround on the BennVenn Freckleshack to allow for more room, but do so at your own risk.