Has anyone ever done it? I have a set written up--I have a funny Bam Bam Bigelow joke :). I am wondering how one gets the nerves to do it. I started with 15 min of material, weened down to 5 doing it to co-workers and the wifey.
Also, 9 x 15 is 135 sq ft. If you want to maximize area, you need to make a circular room. A circular room with a circumference of 48 feet (which is the same distance around as your 12 x 12 room) would have about 183 sq ft.