Hey Lugnut I'm using the pipe insulation also. Thought I was the only cheapskate around! Some more include cutting 3" square mdf pieces and gluing them to another 3" by 10" inch mdf piece (2) to make a risers so i can set my integrated on top off my power amp and still leave room for heat to escape. Only have three shelves so needed a solution. Another is keeping down sleeping bags in their storage bags in the corner as a bass trap. Of course always store any extra blankets, towels, ect. at your reflection points. I always store extra tp, paper towels, coats in the closet in my listening room. I love fixing things with homemade remedies also but thats another story.
Cheers Larry
Cheers Larry