Advise on cutting a hole for a PSU

I could advise it, but it's usually not worth the trouble.

My PSU didn't have a temp change in my 300 from cutting the hole or just keeping it flipped and using the air in the case.

trace a cd and cut out the outline. should give ya perfect circle that will fit the 120mm

hole saw or trace... whatever works for you. for the filter, you can make a frame out of scrap wood or anything thats lying around. Then stretch a pair of pantyhose over it and cut off the excess. TTHEENN you can secure it with the fan screws, or anything else you can think of.

Take a look at what Demented posted the other day - you could try a similar thing or PM him if you have any questions...

Yah i guess its a cheaper way to go

Use a CD for 120mm holes, and you could cut it with a dremmel or with a jigsaw with a fine tooth metal blade, then put this on it:
http://www.mnpctech.com/UChannel.html

I lumped all my Tempest mods together in a one week modding excursion. I traced a CD, and dremeled it out. Used a file to remove burrs. I did it so the cables would be adjacent to the mobo tray, instead of cutting across the case and going behind the tray. I probably wouldn't have done it, but I had my case completely stripped down for a paint job, and I said "why not?" It's on my desk, propped up on 2 books to allow air to get to it. It was a great mod. Worth it for cable management purposes.

If you can get your hands on a 4.5" hole saw it's pretty easy, probably much easier than using a dremel. That is if you are still contemplating putting a new fan in instead of extenders.

I used a dremel, because I wasn't able to swing out to Home Depot to grab a hole saw. Looking back on it, I would have used a hole saw, as the dremel left some nasty marks. Fortunately, it was on the under-side of the case, so it was basically invisible. Remember, always ALWAYS use safety goggles. My whole face was a shade of grey from all the metal when I was finished dremeling. If I hadn't used them, I would be blind for sure. Never mod without safety goggles. I'm sure you already know that