I really liked the overall deign of MrRat's light diffuser, but I found it to be a little too large for my liking. So, using his model as a reference, I decided to make a smaller version, with some modifications to suit my needs. 

I made my version much smaller in size - reducing the filament needed to print, print time, and most importantly making the thing look less obtuse and out of place on the printer itself. (SEE PHOTO FOR COMPARISON)

Additionally, I slightly decreased width of the portion of the diffuser that sits over the printer's stock light bar. I found that MrRat's model was very gratuitous with the spacing and the diffuser liked to move around pretty freely. I reduced the width of this portion so that the diffuser naturally clamps over the light bar, keeping it in place without the need for adhesives.

Lastly, I modeled my own end caps for the diffuser. I found the beam of light shooting out the sides particularly annoying, and wanted a way to block/soften the light coming from the sides. I tested printing in both black and white, I preferred the look of the white, but pick whatever suits your preference.

No adhesives are needed, everything is friction fit and the end caps pop in/out of place. Print 2x of each file for the full product.

Enjoy!