Sick of having to clean the burned bottom of your pot, particularly after a long simmer? Zelph has the answer. Place this underneath your pot above the burner. I’m afraid he doesn’t give any other clues to how it was made, but I’m sure if you have any experience in sheet metal work you will work something out. I imagine you could fairly easily make one out of a piece of aluminium flashing, or some titanium sheet. I hope he doesn’t mind my reposting his photo here: http://www.bplite.com/viewtopic.php?f=2&t=6449
He has many other interesting ideas. See here, for example: http://www.woodgaz-stove.com/ Perhaps he will make you one?