Aham. And yes,before that I was thinking to make a holes on that side(Like this)
otherwise of the cpu,and to put my 120mm fan inside,to take that air from inside.
For this conf,I don't need water cooling,and it's also too expensive for me. You think about adding fan here ? I was thinking that also,but if put it there,it wont be able to cool my cpu,because just above the cpu is psu case.
For the plexiglass I'm not sure,because they are expensive here.