Help on case mod

Alright hey guys

I dont normally come to tech for help but yea...
so i want to put fans into the bottom of my case 2x 120mm
it is got to help me or just disrupt my airflow...
and im also thinking of a 80mm blowhole

the case i a generic acer case... I was broke on this build so i used what i had around...

case modding is for faggots

just get a good case to  begin with

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