I installed a sub in my Star Trek and Tron. I didn't drill any holes I just did it the way Mike Wong told me (thanks Mike!) except I did tighten the nuts pretty tight but the sub still works so it's all good. I have Tron and ST sharing the sub. I also changed most of the white GI out, added a light strip at the flippers again and a colour changing light strip at the back. With the colour changer back there it looks like it is flying through space. I also added three LED strips under the vengeance ship, it adds a cool effect.