https://photos.app.goo.gl/VfPbYYVfEGuB7jhz9
I just bought a new aspire nautilus (5 hours ago and saw a video with some guy telling how to drill bigger air holes . So I took (apparently) a drill for wood and started drilling.. And drilling and drilling lol.. Now I found out that I have ruined the air flow due to the heat from the drilling, the air flow ring got stuck.. Really stuck.. So I took a bigger drill and started drilling again.. At this point I was very sad due I had just bought the aspire nautilus and looking back this was a dumb idea (I am not a handy man).. And if you look at the picture (link above) you can see my new tank with a big hole in the middle lol ...but guess what.. The air flow is perfectly fine.. But don't do this unless you have a good idea about what you are doing..