go pick up a par of black metal adjustable stands from Ikea for 40 bucks.
The DIY stands in that article look like crap in my opinion. Pay an extra 20 bucks, save time, and have professionaly made. Otherwise, why bother even making that crap? Go buy some cylinder blocks turn them vertically and you're set. They are heavy, reduce unnecessary vibrations, cheap, and just as ugly as the DIY recipe.