Rework Skywatcher 80ED Flatfield Box

Hi here is a remix of m0k2001's work for myself but I thought that if someone was in the same situation as me I might as well share it :)
This is a small modification of the top part where there was a ventilation grille that I modified to have a flat bottom without a hole in order to stick a strip of white LEDs that I don't use at home, having a lot of electronic "Waste" at home I have HS screens and I plan to use the light diffuser that is inside the LCD screens ...
I print all this in PETG for more lightness and resistance to humidity but you can like m0k2001 did print it in PLA.
Let's get to work!