Now, we use our Set Square to fold up the shroud at the edges:

It should look like this:

We then use some clear tape to tape her up:

Using the fan grills, we mark out the screw holes for the fans with our marker:

At the same time we also mark out the blow-holes for the fans:

Now, we use our sharp tipped screwdriver and hammer a hole into our fan screwholes.

We do the same for the fan holes: