DIY Light Tent

I was reading up on creating that awesome sauce DIY light tent from the strobist site (http://www.strobist.blogspot.com/2006/07/how-to-diy-10-macro-photo-studio.html), then built one myself. Used correctly, it has some truly sweet results:
http://i14.photobucket.com/albums/a335/Meredith_Nichols/E3/50/Old%20tech%20shoot/P9278018.jpg
Unfortunately, it does have some drawbacks when shooting shiny stuff. For example, the sides and the top may be reflected in the objects. One option is to simply change the angle of the objects to avoid the reflections. However, that may limit the angles possible for the shoot.

To solve that, selectively blocking off the windows may help. Another option is to move the light source to de-emphasize the reflections. Of course, the perfect world solution is to simply get a light tent equivalent without the cardboard that comes with the territory.

I was reading a book on constructing DIY photographic equipment and it seems that the fiberglass rods used to make kites is remarkably good when coupled with the light diffusing material. Of course, I currently have no access to that material, and am a bit skeptical about just how budget the rods might be...