Above is a few mods I made for my 2U Inter-Tech 2U-20240 server case. 

• The first mod is a fan shroud in order to allow a more direct path for the flow, I have 0 idea about airflow mechanics but I think it looks very clean and badass this way, also given the chance of disassembly i took the opportunity to add a fine mesh to act as a primitive filter to the intake of the case. While running I can feel a descent airflow in front of the case.

• The second mod, is similar to the first, i made some blanks to block all the dust/airflow for the 2.5 bays, they are unpopulated at the time and it matches well with the other bays cosmetically.

• Third mod is a simple cover to the 2.5 upper slot where the buttons and led's are located, the chassis only supports motherboards with 19cm but I didn't read the datasheet carefully so the only move for my build was to move the whole front assembly 1 screw outwards as showed in the pictures. 

• Fourth and last mod is the Akyga ITX mount plate, it gives you the ability to mount a 200W (AK-I1-200) and a 60mm fan next to it, as an exhaust fan.

Enjoy and feel free to made any recommendations or provide your support by giving me a boost!