archilochus said:Yes...I call those things, fan grids...They are restrictive..Removing them increases air flow and reduces noise...Some ppl's like to install wire finger guards on the rear of the case for safety reasons...I go without..it's easier to clean the fan blades...
Various tools can be used to remove the fan grids...I personally use right cut, green handle aviation tin snips..
No way !!!!
80mm hole saw with a 1/2 inch drill you can never turn down a chance to use power tools.