I might be inclined to put a window in the top, or perhaps a dual 120/140mm fan hole.
For the rear I would be looking at drilling out a 120mm fan hole in the middle of that dual 80mm slot. Either dremel or hole saw.
Quite like the purple UV idea.
For the rear I would be looking at drilling out a 120mm fan hole in the middle of that dual 80mm slot. Either dremel or hole saw.
Quite like the purple UV idea.

Will hopefully be lighing it all up with uv's if they are bright enough