This is one approach to installing any one of Mnpctech’s new Overkill 120mm Fan Grills on a LIAN LI PC-7B plus II Black Aluminum ATX Mid Tower Computer Case. I’ll be illustrating different installation of the Overkill grills on this thread at Xoxide Forums. I like to describe the Overkill Grills as “3D fan grills” They’re cnc machined from 1/2″ thick 6061 aluminum. They measure 5.5″ x 5.5″ and weigh 1/2 pound. 4-5/8″ opening.

Tools & Supplies used in this guide.
Measuring square.
Small Flat head screw driver.
Phillips screw driver.
120mm wire fan grill.
Center punch.
Paint Pen or Marker.
Drill press (or Power Drill)
4.5″ hole saw attachment.
2, Large C-clamps (if you’re using Drill press)
2 x 4 block of wood.
Dremel with barrel sander attachment (or rounded side hand file)
Hand punch as shown here for making the screw mounting holes, or you can use a power drill.
Sheet Metal Tin Snips.

Here is the Lian Li PC7-plus mid tower case, $89.99 at newegg.com

Using a Red paint pen to mark off the location of the opening for the fan grill.

Using a small flat screw driver to remove the adhesive backed case badge.

Using measuring square to find the exact center location for the hole saw attachment’s center drill bit.

Using center punch to mark center for hole saw center bit.

Before cutting the hole in the bezel on the drill press, you should remove the “snap in” tab insert on the bottom of the bezel. It’s held on with 2, screws.

If you’re using a Drill press, you’ll wanna prop the Li Li PC-7plus bezel on a piece of wood to prevent it from bending. 2 x 4 block of wood is perfect.

I’ve attached the hole attachment to a drill press, but you can use a Power drill, Jigsaw or Dremel with 1.5″ cutting wheel attachment.

Notice that I’ve placed pieces of acrylic under the C-Clamp heads, so I don’t scratch the bezel surface.

I always spray a bit of WD-40 oil on the hole saw blade to help reduce heat caused by friction.

Using a 4.5″ hole saw attachment will leave 1/8″ of material exposed by the grill’s 4-5/8″ opening. I’ve highlighted this with the Red paint pen.

To remove the 1/8″ lip, I’ll use barrel drum sander attachment on my Dremel, or a rounded side hand file.

I use a Roper Whitney hand punch to make my screw holes, but you can use power drill with 1/4 drill bit.

This step is optional if you’re using the same case. I just prefer to remove the 2, beams in the front 120mm fan opening, it lends to a cleaner look.

I’ve installed a 120mm Yate Loon Blue Led Fan.

I’m using 4x 8/32 socket head machine screws/nuts to attach the Turbine grill. Each Overkill grill includes 4x #10 x 5/8″ self tapping screws

The new “Flame” design added to Overkill 120mm Fan Grill Product line

Here is a review of the LIAN LI PC-7B plus II Black Aluminum ATX Mid Tower Computer Case