Placing a fan on top of case

[Blinkin]

Ok so my computers working again. I had to replace the HD, Power supply, cpu and ram all due to excessive over-clocking. Anyway im now trying to get more cooling for my puter. But the case that I just painted lacks proper fan placement. So im gonna put a fan on the top of the case. I kinda rushed into it and drilled the screw holes and now I dont know how to make it so air can get out. I dont wanna use a fan grill though, just like a bunch of holes or something. Anyone know how I should proceed?

[Brian]

Well, you could tape off the entire top, and draw a grid with lines spaced as far apart as you want the holes. Then just drill a hole at each intersection. Use a very small bit at first as a guide if you want it to look pretty.