So I have been working on getting into knifemaking. I have basically completed a few fixed blades and a few folders, but need to heat treat them to finish up. I read just about every article I could find on one and two brick forges, but still was not able to heat more than 1'' of blade to critical temp. I assume that this is only from it being heated directly from the flame. I started on my smallest blade to try it out, and am disappointed that a 4'' x 1/2'' x 1/8'' blade would not heat up in this forge. I figure the problem is most likely the design of the forge or the quality of the propane burner. Any advice appreciated. Also, how far into the hole, if at all, should the tip of the torch be inside the hole? I put it about 1/2'' in when I did it. I purchased a Bernzomatic WT2301 for my heat. I got a few soft firebricks and carved out a small cavity, with a small port in back, a medium-sized port in front, and a small hole top-center for the torch to come in tangent to the curve of the cavity. I wrapped it up in some chickenwire, got my oil and magnet ready, and started it up. I let it heat for a couple minutes before starting on a blade. After about 10 minutes in the forge, I could not get even half of the blade to be orange. My lighting is low, as recommended, so I can tell to color better (though I am using the Curie point more than color, and only using color to tell which parts are hotter than others). I tried multiple positions of the blade in the cavity. With the blade int he middle or bottom of the cavity, it barely heated at all. It only would get near critical when held at the top, in the path of the flame. Here are the pictures of the setup and the tiny blade that I was unable to heat treat with it. Again, this blade is about 4'' x 1/2'' x 1/8''