I saw PLanetaryGear's parametric cooling stand and loved the idea. It just bothered me that the air holes didn't always align down the center, so I made my own version from the ground up, keeping in mind some of the great ideas utilized in the code of the original.

To customize this, go down to Apps and click Customizer, where you can then change the settings and it will generate a new model for you.

You can adjust Width, Length, Thickness, Height and more parameters.

I would recommend adjusting "width" and "length" to the desired size, then adjusting "hole_spacing_x" and "hole_spacing_y" so that it looks nice.

I am going to use this to support my Xbox 360 so it does not overheat.

Enjoy!

If you are using the underhang option, to make it fit nicely it is best to increase "length" and "width" by the amount that you are using for "thickness" (and maybe + ~0.5mm just for tolerance).